[Parse] Inline skipExtraTopLevelRBraces()

Removed from 'parseTopLevel()'. There's no particular reason to diagnose
it in 'parseTopLevel()'.

lib/Parse/ParseDecl.cpp

@@ -196,8 +196,6 @@ bool Parser::parseTopLevel() {
   // Parse the body of the file.
   SmallVector<ASTNode, 128> Items;
 
-  skipExtraTopLevelRBraces();
-
   // If we are in SIL mode, and if the first token is the start of a sil
   // declaration, parse that one SIL function and return to the top level.  This
   // allows type declarations and other things to be parsed, name bound, and
@@ -280,19 +278,6 @@ bool Parser::parseTopLevel() {
   return FoundTopLevelCodeToExecute;
 }
 
-bool Parser::skipExtraTopLevelRBraces() {
-  if (!Tok.is(tok::r_brace))
-    return false;
-  while (Tok.is(tok::r_brace)) {
-    diagnose(Tok, diag::extra_rbrace)
-        .fixItRemove(Tok.getLoc());
-    consumeToken();
-  }
-  return true;
-}
-
-
-
 static Optional<StringRef>
 getStringLiteralIfNotInterpolated(Parser &P, SourceLoc Loc, const Token &Tok,
                                   StringRef DiagText) {