clean up obsolete comment

From-SVN: r82885

gcc/c-gimplify.c

@@ -833,21 +833,8 @@ gimplify_return_stmt (tree *stmt_p)
   return GS_OK;
 }
 
-/* Gimplifies a DECL_STMT node T.
-
-   If a declaration V has an initial value I, create an expression 'V = I'
-   and insert it after the DECL_STMT.
-
-   PRE_P is a queue for effects that should happen before the DECL_STMT.
-
-   MID_P is a queue for effects that should happen after the DECL_STMT,
-   but before uses of the initialized decl.
-
-   POST_P is a queue for effects that should happen after uses of the
-   initialized decl.
-
-   Usually these last two will be the same, but they may need to be
-   different if the DECL_STMT is somehow embedded in an expression.  */
+/* Gimplifies a DECL_STMT node *STMT_P by making any necessary allocation
+   and initialization explicit.  */
 
 static enum gimplify_status
 gimplify_decl_stmt (tree *stmt_p)