Revert r37316

The commit introduces too many failures and disturbs release engineering.
Re-commit it with fixed tests.

Thu Oct 25 13:09:01 2012  NAKAMURA Usaku  <usa@ruby-lang.org>

       * parse.y: show a warning for concatenating string literals because
         it will be deprecated in the future.
         patched by mame (Yusuke Endoh) at [ruby-core:44207].
         [ruby-core:44156] [Feature #6265]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37327 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 0 insertions, 1 deletions

diff --git a/parse.y b/parse.y
index 7bf3149e2b..7eaab6b1b8 100644
--- a/parse.y
+++ b/parse.y
@@ -3810,7 +3810,6 @@ string		: tCHAR
 		| string string1
 		    {
 		    /*%%%*/
-			rb_warning0("string concatenation syntax will be deprecated");
 			$$ = literal_concat($1, $2);
 		    /*%
 			$$ = dispatch2(string_concat, $1, $2);