Do not report ERROR when sample rate equals 100

src/sql/engine/expr/ob_expr_pl_sqlcode_sqlerrm.cpp

@@ -193,12 +193,5 @@ int ObExprPLSQLCodeSQLErrm::eval_pl_sql_code_errm(
   return ret;
 }
 
-DEF_SET_LOCAL_SESSION_VARS(ObExprPLSQLCodeSQLErrm, raw_expr) {
-  int ret = OB_SUCCESS;
-  SET_LOCAL_SYSVAR_CAPACITY(1);
-  EXPR_ADD_LOCAL_SYSVAR(share::SYS_VAR_COLLATION_CONNECTION);
-  return ret;
-}
-
 }
 }