Vim highlighting: remove foreach keyword

Author: chris-morgan

src/etc/vim/syntax/rust.vim

@@ -17,7 +17,7 @@ syn keyword   rustOperator    as
 syn match     rustAssert      "\<assert\(\w\)*!" contained
 syn match     rustFail        "\<fail\(\w\)*!" contained
 syn keyword   rustKeyword     break copy do extern
-syn keyword   rustKeyword     foreach in if impl let log
+syn keyword   rustKeyword     in if impl let log
 syn keyword   rustKeyword     copy do extern
 syn keyword   rustKeyword     for impl let log
 syn keyword   rustKeyword     loop mod once priv pub