winex11: XInitThreads is hopeless, remove it again.

dlls/winex11.drv/x11drv_main.c

@@ -484,7 +484,6 @@ sym_not_found:
 static BOOL process_attach(void)
 {
     Display *display;
-    const char *env;
 
     setup_options();
 
@@ -492,9 +491,6 @@ static BOOL process_attach(void)
 
     /* Open display */
 
-    if (!(env = getenv("XMODIFIERS")) || !*env)  /* try to avoid the Xlib XIM locking bug */
-        if (!XInitThreads()) ERR( "XInitThreads failed, trouble ahead\n" );
-
     if (!(display = XOpenDisplay( NULL ))) return FALSE;
 
     fcntl( ConnectionNumber(display), F_SETFD, 1 ); /* set close on exec flag */