fix: #432 remove error rule

Author: liuxy0551

src/grammar/postgresql/PostgreSqlParser.g4

@@ -1,12 +1,12 @@
 /*
  * [The "MIT license"] Copyright (C) 2014 Sam Harwell, Tunnel Vision Laboratories, LLC
- * 
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
  * associated documentation files (the "Software"), to deal in the Software without restriction,
  * including without limitation the rights to use, copy, modify, merge, publish, distribute,
  * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
- * 
+ *
  * 1. The above copyright notice and this permission notice shall be included in all copies or
  * substantial portions of the Software. 2. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
  * ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
@@ -2378,7 +2378,6 @@ primaryExpression
     | OPEN_PAREN expression COMMA exprList CLOSE_PAREN
     | row KW_OVERLAPS row
     | columnNamePath
-    | qualifiedName
     | primaryExpression TYPECAST typename
     | (PLUS | MINUS) primaryExpression
     | primaryExpression qualOp primaryExpression?