i965: Remove unused struct brw_vs_ouput_sizes.

With a name like that, it can't be used.  Sure enough, it's not.

Reviewed-by: Eric Anholt <eric@anholt.net>

src/mesa/drivers/dri/i965/brw_context.h

@@ -461,14 +461,6 @@ struct brw_vs_prog_data {
    const float **pull_param;
 };
 
-
-/* Size == 0 if output either not written, or always [0,0,0,1]
- */
-struct brw_vs_ouput_sizes {
-   GLubyte output_size[VERT_RESULT_MAX];
-};
-
-
 /** Number of texture sampler units */
 #define BRW_MAX_TEX_UNIT 16