`racket/base` sans mutative procedures

pure-mlang.rkt

#lang racket/base
(provide
 (except-out
  (all-from-out racket/base)
  set!
  set!-values
  box-cas!
  bytes-copy!
  bytes-fill!
  bytes-set!
  compile-allow-set!-undefined
  environment-variables-set!
  hash-clear!
  hash-ref!
  hash-remove!
  hash-set!
  hash-set*!
  hash-update!
  make-set!-transformer
  namespace-set-variable-value!
  namespace-undefine-variable!
  peek-bytes!
  peek-bytes-avail!
  peek-bytes-avail!*
  peek-bytes-avail!/enable-break
  peek-string!
  placeholder-set!
  plumber-add-flush!
  plumber-flush-handle-remove!
  port-count-lines!
  prop:set!-transformer
  read-bytes!
  read-bytes-avail!
  read-bytes-avail!*
  read-bytes-avail!/enable-break
  read-string!
  set!-transformer-procedure
  set!-transformer?
  set-box!
  set-box*!
  set-mcar!
  set-mcdr!
  set-phantom-bytes!
  set-port-next-location!
  string-copy!
  string-fill!
  string-set!
  thread-cell-set!
  vector*-set!
  vector->pseudo-random-generator!
  vector-cas!
  vector-copy!
  vector-fill!
  vector-set!
  vector-set-performance-stats!))