llvmpipe: stop using pipe_sampler_view_release()

This was used to avoid freeing a sampler view which was created by a
context that was already deleted.  But the state tracker does not
allow that.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Reviewed-by: Neha Bhende <bhenden@vmware.com>
Reviewed-by: Mathias Fröhlich <Mathias.Froehlich@web.de>
Reviewed-By: Jose Fonseca <jfonseca@vmware.com>

src/gallium/drivers/llvmpipe/lp_state_sampler.c

@@ -123,12 +123,6 @@ llvmpipe_set_sampler_views(struct pipe_context *pipe,
 
    /* set the new sampler views */
    for (i = 0; i < num; i++) {
-      /* Note: we're using pipe_sampler_view_release() here to work around
-       * a possible crash when the old view belongs to another context that
-       * was already destroyed.
-       */
-      pipe_sampler_view_release(pipe,
-                                &llvmpipe->sampler_views[shader][start + i]);
       /*
        * Warn if someone tries to set a view created in a different context
        * (which is why we need the hack above in the first place).