redundant code

src/compiler/checker.ts

@@ -24749,8 +24749,6 @@ namespace ts {
                 case SyntaxKind.ExportAssignment:
                     return checkExportAssignment(<ExportAssignment>node);
                 case SyntaxKind.EmptyStatement:
-                    checkGrammarStatementInAmbientContext(node);
-                    return;
                 case SyntaxKind.DebuggerStatement:
                     checkGrammarStatementInAmbientContext(node);
                     return;