i965: Remove caching of surface state objects.

It turns out that computing a 56 byte key to look up a 20-byte object
out of a hash table was some sort of a bad idea.  Whoops.

before:
[ # ]  backend                         test   min(s) median(s) stddev. count
[  0]       gl            firefox-talos-gfx   37.799   38.203   0.39%    6/6
after:
[  0]       gl            firefox-talos-gfx   34.761   34.784   0.17%    5/6

1 files changed, 0 insertions, 13 deletions

diff --git a/src/mesa/drivers/dri/intel/intel_mipmap_tree.c b/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
index 71ef7a8e39..41b658648e 100644
--- a/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
@@ -203,19 +203,6 @@ intel_miptree_release(struct intel_context *intel,
 
       DBG("%s deleting %p\n", __FUNCTION__, *mt);
 
-#ifndef I915
-      /* Free up cached binding tables holding a reference on our buffer, to
-       * avoid excessive memory consumption.
-       *
-       * This isn't as aggressive as we could be, as we'd like to do
-       * it from any time we free the last ref on a region.  But intel_region.c
-       * is context-agnostic.  Perhaps our constant state cache should be, as
-       * well.
-       */
-      brw_state_cache_bo_delete(&brw_context(&intel->ctx)->surface_cache,
-				(*mt)->region->buffer);
-#endif
-
       intel_region_release(&((*mt)->region));
 
       for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {