Revert "i965: Use VBOs in the VBO module on 965, now that we have ARB_map_buffer_range."

This reverts commit 00413d8742.  Even with
fixes, using ARB_map_buffer_range in the VBO module isn't showing up as a
significant win, and some cases apparently regressed.

Bug #23624.

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

@@ -167,8 +167,6 @@ GLboolean brwCreateContext( const __GLcontextModes *mesaVis,
 
    brw_draw_init( brw );
 
-   vbo_use_buffer_objects(ctx);
-
    return GL_TRUE;
 }