anv: Remove vf_flush for start of command buffers

These vertex fetch flushes aren't required in gen9+ because the display
driver will take care of this invalidation on QueueSubmit. So let's remove it.

Signed-off-by: Casey Bowman <casey.g.bowman@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38317>

src/intel/vulkan/genX_cmd_buffer.c

@@ -3252,23 +3252,6 @@ genX(BeginCommandBuffer)(
       genX(cmd_buffer_emit_bt_pool_base_address)(cmd_buffer);
    }
 
-   /* We sometimes store vertex data in the dynamic state buffer for blorp
-    * operations and our dynamic state stream may re-use data from previous
-    * command buffers.  In order to prevent stale cache data, we flush the VF
-    * cache.  We could do this on every blorp call but that's not really
-    * needed as all of the data will get written by the CPU prior to the GPU
-    * executing anything.  The chances are fairly high that they will use
-    * blorp at least once per primary command buffer so it shouldn't be
-    * wasted.
-    *
-    * There is also a workaround on gfx8 which requires us to invalidate the
-    * VF cache occasionally.  It's easier if we can assume we start with a
-    * fresh cache (See also genX(cmd_buffer_set_binding_for_gfx8_vb_flush).)
-    */
-   anv_add_pending_pipe_bits(cmd_buffer,
-                             ANV_PIPE_VF_CACHE_INVALIDATE_BIT,
-                             "new cmd buffer");
-
    /* Invalidate the aux table in every primary command buffer. This ensures
     * the command buffer see the last updates made by the host.
     */