Drop outdated documentation about i18n support

This documentation page is not very informative. Basically it says we
don't have i18n support because "there are some issues with the way the
code produces output". I'm not sure how the situation is with PolyGerrit
nowadays, but since this page hasn't been updated in a long time it's
safe to assume that the information in it is mostly outdated and hence
having this page doesn't provide much value.

We still dicuss "Internationalization and Localization" in the dev
design.

Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: Ia0c21b06acf43bd8098ec52dd1c9b3580206d4b6

Documentation/dev-community.txt

@@ -22,7 +22,6 @@ Gerrit is developed as a self-hosting open source project:
 .. link:dev-stars.html[Starring Changes]
 .. link:quota.html[Quota Enforcement]
 . link:dev-design.html[System Design]
-. link:i18n-readme.html[i18n Support]
 
 == Maintainer
 . link:dev-release.html[Making a Gerrit Release]

Documentation/dev-design.txt

@@ -193,8 +193,6 @@ Gerrit code base.  Some portions of the code have tried to take
 RTL into consideration, while others probably need to be modified
 before translating the UI to an RTL language.
 
-* link:i18n-readme.html[Gerrit's i18n Support]
-
 
 == Accessibility Considerations
 

Documentation/i18n-readme.txt

@@ -1,24 +0,0 @@
-= Gerrit Code Review - i18n
-
-Aside from actually writing translations, there are some issues with
-the way the code produces output.  Most of the UI should support
-right-to-left (RTL) languages.
-
-== Labels
-
-Labels and their values are defined in project.config by the Gerrit
-administrator or project owners.  Only a single translation of these
-strings is supported.
-
-== /Gerrit Gerrit.html
-
-* The title of the host page is not translated.
-
-* The <noscript> tag is not translated.
-
-GERRIT
-------
-Part of link:index.html[Gerrit Code Review]
-
-SEARCHBOX
----------