override val unwantedDefinitions = SwaggerGarbage.hiddenImplicits for your SwaggerHttpService

unwantedDefinitions.scala

object SwaggerGarbage {
  val hiddenImplicits = Seq(
    "AssetRoutes",
    "AuthenticationDirective",
    "AuthenticationDirectiveObject",
    "Authority",
    "ByteRange",
    "ByteRanges",
    "CircuitBreaker",
    "ClassLoader",
    "ClassTag",
    "ClassTagHttpCredentials",
    "CompleteOrRecoverWithMagnet",
    "ContentType",
    "ContentTypeResolver",
    "DateTime",
    "Decoder",
    "Default",
    "DerivedDecoder",
    "DerivedObjectEncoder",
    "Directive",
    "DirectiveBoxedUnit",
    "DirectiveObject",
    "DirectiveTuple1ActorSystem",
    "DirectiveTuple1ExecutionContextExecutor",
    "DirectiveTuple1HttpCookiePair",
    "DirectiveTuple1HttpMethod",
    "DirectiveTuple1HttpRequest",
    "DirectiveTuple1Language",
    "DirectiveTuple1LoggingAdapter",
    "DirectiveTuple1MapStringListString",
    "DirectiveTuple1MapStringString",
    "DirectiveTuple1Materializer",
    "DirectiveTuple1Object",
    "DirectiveTuple1OptionHttpCookiePair",
    "DirectiveTuple1OptionHttpCredentials",
    "DirectiveTuple1OptionHttpHeader",
    "DirectiveTuple1OptionObject",
    "DirectiveTuple1OptionString",
    "DirectiveTuple1ParserSettings",
    "DirectiveTuple1Path",
    "DirectiveTuple1RemoteAddress",
    "DirectiveTuple1RequestContext",
    "DirectiveTuple1RequestEntity",
    "DirectiveTuple1RoutingSettings",
    "DirectiveTuple1SeqString",
    "DirectiveTuple1SeqTuple2StringString",
    "DirectiveTuple1SourceByteStringObject",
    "DirectiveTuple1Strict",
    "DirectiveTuple1String",
    "DirectiveTuple1Throwable",
    "DirectiveTuple1TryObject",
    "DirectiveTuple1Tuple2FileInfoFile",
    "DirectiveTuple1Tuple2FileInfoSourceByteStringObject",
    "DirectiveTuple1UpgradeToWebSocket",
    "DirectiveTuple1Uri",
    "DirectoryRenderer",
    "Duration",
    "Encoder",
    "EntityStreamingSupport",
    "EntityTag",
    "ExceptionHandler",
    "ExecutionContext",
    "ExecutionContextExecutor",
    "FieldMagnet",
    "FiniteDuration",
    "Flow",
    "FlowByteStringByteStringNotUsed",
    "FlowMessageMessageObject",
    "FlowShape",
    "FlowShapeMessageMessage",
    "FlowShapeObjectObject",
    "Function0",
    "Function0FutureObject",
    "Function0Object",
    "Function0ToResponseMarshallable",
    "Function1",
    "Function1CredentialsFutureOptionObject",
    "Function1CredentialsOptionObject",
    "Function1Function1ObjectBoxedUnitBoxedUnit",
    "Function1Function1RequestContextFutureRouteResultFunction1RequestContextFutureRouteResult",
    "Function1FutureRouteResultFutureRouteResult",
    "Function1HttpHeaderOptionObject",
    "Function1HttpRequestHttpRequest",
    "Function1HttpRequestHttpResponse",
    "Function1HttpResponseHttpResponse",
    "Function1LoggingAdapterFunction1HttpRequestBoxedUnit",
    "Function1LoggingAdapterFunction1HttpRequestFunction1RouteResultBoxedUnit",
    "Function1LoggingAdapterFunction1RouteResultBoxedUnit",
    "Function1LoggingAdapterObject",
    "Function1ObjectObject",
    "Function1OptionHttpCredentialsFutureEitherHttpChallengeObject",
    "Function1PathPath",
    "Function1RejectionObject",
    "Function1RequestContextFutureObject",
    "Function1RequestContextFutureRouteResult",
    "Function1RequestContextObject",
    "Function1RequestContextRequestContext",
    "Function1ResponseEntityResponseEntity",
    "Function1RouteResultFutureRouteResult",
    "Function1RouteResultRouteResult",
    "Function1RoutingSettingsRoutingSettings",
    "Function1SeqHttpHeaderSeqHttpHeader",
    "Function1SeqRejectionFutureRouteResult",
    "Function1SeqRejectionRouteResult",
    "Function1SeqRejectionSeqRejection",
    "Function1StringObject",
    "HeaderMagnet",
    "HeaderMagnetHttpHeader",
    "HeaderMagnetObject",
    "HexIntNumber$",
    "HexLongNumber$",
    "Host",
    "HttpCharset",
    "HttpCookie",
    "HttpEncoding",
    "HttpHeader",
    "HttpMethod",
    "HttpOrigin",
    "HttpProtocol",
    "HttpResponse",
    "Inlet",
    "InletMessage",
    "InletObject",
    "Integral",
    "IntegralObject",
    "IntNumber$",
    "Iterable",
    "IterableHttpHeader",
    "IterableInetAddress",
    "IterableString",
    "Language",
    "LoggingAdapter",
    "LoggingMagnet",
    "LoggingMagnetFunction1HttpRequestBoxedUnit",
    "LoggingMagnetFunction1HttpRequestFunction1RouteResultBoxedUnit",
    "LoggingMagnetFunction1RouteResultBoxedUnit",
    "LongNumber$",
    "Marshaller",
    "MarshallerObjectHttpResponse",
    "Materializer",
    "Module",
    "Multipart",
    "NameOptionReceptacle",
    "NameOptionReceptacleString",
    "NameReceptacle",
    "NameReceptacleString",
    "OnSuccessMagnet",
    "Option",
    "OptionalLong",
    "OptionDateTime",
    "OptionEntityTag",
    "OptionFunction1HttpRequestHttpResponse",
    "OptionString",
    "Outlet",
    "OutletMessage",
    "OutletObject",
    "ParamMagnet",
    "PartialFunction",
    "PartialFunctionCredentialsFutureObject",
    "PartialFunctionCredentialsObject",
    "PartialFunctionHttpHeaderObject",
    "PartialFunctionRouteResultFutureRouteResult",
    "PartialFunctionRouteResultRouteResult",
    "Path",
    "PathEnd$",
    "PathMatcher",
    "PathMatcherBoxedUnit",
    "PathMatcherObject",
    "PathMatcherTuple1ListString",
    "PathMatcherTuple1Object",
    "PathMatcherTuple1String",
    "PathMatcherTuple1UUID",
    "Pattern",
    "Redirection",
    "Regex",
    "Rejection",
    "RejectionHandler",
    "Remaining$",
    "RemainingPath$",
    "RequestEntityAcceptance",
    "ResponseEntity",
    "RouteWithConcatenation",
    "RoutingSettings",
    "Scheduler",
    "Segment$",
    "SeqClass",
    "SeqDecoder",
    "SeqEncoder",
    "SeqFunction1RequestContextFutureRouteResult",
    "SeqHttpCookie",
    "SeqHttpHeader",
    "SeqLanguage",
    "SeqRejection",
    "SeqString",
    "Slash$",
    "Source",
    "SourceBodyPartObject",
    "SourceByteStringObject",
    "StandardRoute",
    "StatusCode",
    "Symbol",
    "ToResponseMarshallable",
    "Tuple",
    "Tuple2",
    "Tuple2StringObject",
    "TupleBoxedUnit",
    "TupleObject",
    "TupleTuple1ActorSystem",
    "TupleTuple1ExecutionContextExecutor",
    "TupleTuple1HttpCookiePair",
    "TupleTuple1HttpMethod",
    "TupleTuple1HttpRequest",
    "TupleTuple1Language",
    "TupleTuple1ListString",
    "TupleTuple1LoggingAdapter",
    "TupleTuple1MapStringListString",
    "TupleTuple1MapStringString",
    "TupleTuple1Materializer",
    "TupleTuple1Object",
    "TupleTuple1OptionHttpCookiePair",
    "TupleTuple1OptionHttpCredentials",
    "TupleTuple1OptionHttpHeader",
    "TupleTuple1OptionObject",
    "TupleTuple1OptionString",
    "TupleTuple1ParserSettings",
    "TupleTuple1Path",
    "TupleTuple1RemoteAddress",
    "TupleTuple1RequestContext",
    "TupleTuple1RequestEntity",
    "TupleTuple1RoutingSettings",
    "TupleTuple1SeqString",
    "TupleTuple1SeqTuple2StringString",
    "TupleTuple1SourceByteStringObject",
    "TupleTuple1Strict",
    "TupleTuple1String",
    "TupleTuple1Throwable",
    "TupleTuple1TryObject",
    "TupleTuple1Tuple2FileInfoFile",
    "TupleTuple1Tuple2FileInfoSourceByteStringObject",
    "TupleTuple1UpgradeToWebSocket",
    "TupleTuple1Uri",
    "TupleTuple1UUID",
    "UniversalEntity",
    "Unmarshaller",
    "UnmarshallerByteStringObject",
    "UnmarshallerHttpRequestObject",
    "UnmarshallerHttpRequestSourceObjectNotUsed",
    "Uri")
}