removed shift/reduce conflict

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@9130 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/parser.y

@@ -78,8 +78,6 @@ command	:       WORD PERIOD
 
 expr	:	WORD OPEN arglist CLOSE 
 			{$$ = proio_cons(wxmake_word($1), $3); free($1);}
-	|	OPEN_SQUARE CLOSE_SQUARE
-                        {$$ = proio_cons(NULL, NULL);}
 	|	OPEN_SQUARE arglist CLOSE_SQUARE
 			{$$ = $2; }
 	;