Deprecate Japanese Commentary

BUR #42 has been approved by @ANON_TOKYO.

deprecate japanese_commentary
nuke japanese_commentary

We're viewing Japanese as the default language so we won't be needing this.

The bulk update request #42 (forum #97) has been approved by @ANON_TOKYO.

@Iroshi Since we're viewing Japanese as the default language, we won't be needing this tag. Same goes for Japanese in the picture itself. Feel free to add tags for other languages though.

change da world,my final message,goobye