123.diff

diff --git a/python/mozrelease/mozrelease/l10n.py b/python/mozrelease/mozrelease/l10n.py
--- a/python/mozrelease/mozrelease/l10n.py
+++ b/python/mozrelease/mozrelease/l10n.py
@@ -4,18 +4,16 @@
 
 from __future__ import absolute_import
 
-from .platforms import shippedLocales2ftp
-
 
 def getPlatformLocales(shipped_locales, platform):
     platform_locales = []
     for line in shipped_locales.splitlines():
-        entry = line.strip().split()
-        locale = entry[0]
-        if len(entry) > 1:
-            for sl_platform in entry[1:]:
-                if platform in shippedLocales2ftp(sl_platform):
-                    platform_locales.append(locale)
-        else:
-            platform_locales.append(locale)
+        locale = line.strip().split()[0]
+        # ja-JP-mac locale is a MacOS only locale
+        if locale == "ja-JP-mac" and not platform.startswith("macos"):
+            continue
+        # Skip the "ja" locale on MacOS
+        if locale == "ja" and platform.startswith("macos"):
+            continue
+        platform_locales.append(locale)
     return platform_locales
diff --git a/python/mozrelease/mozrelease/platforms.py b/python/mozrelease/mozrelease/platforms.py
--- a/python/mozrelease/mozrelease/platforms.py
+++ b/python/mozrelease/mozrelease/platforms.py
@@ -54,15 +54,5 @@ def ftp2shippedLocales(platform):
     return sl_platform_map.get(platform, platform)
 
 
-def shippedLocales2ftp(platform):
-    matches = []
-    try:
-        [matches.append(
-            k) for k, v in sl_platform_map.iteritems() if v == platform][0]
-        return matches
-    except IndexError:
-        return [platform]
-
-
 def ftp2infoFile(platform):
     return info_file_platform_map.get(platform, platform)