Get rid of a bunch of TSX functions.

diff --git a/dlls/x11drv/clipboard.c b/dlls/x11drv/clipboard.c
index 9901701..3fe78a4 100644
--- a/dlls/x11drv/clipboard.c
+++ b/dlls/x11drv/clipboard.c
@@ -1589,7 +1589,9 @@
 
     /* Delete the property on the window now that we are done
      * This will send a PropertyNotify event to the selection owner. */
-    TSXDeleteProperty(display,w,prop);
+    wine_tsx11_lock();
+    XDeleteProperty(display,w,prop);
+    wine_tsx11_unlock();
 
     /* Free the retrieved property data */
     HeapFree(GetProcessHeap(),0,val);