i965: remove duplicated comment

Signed-off-by: Leandro Ribeiro <leandrohr@riseup.net>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/2416>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/2416>

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

@@ -710,8 +710,7 @@ intel_create_image_common(__DRIscreen *dri_screen,
    bool ok;
 
    /* Callers of this may specify a modifier, or a dri usage, but not both. The
-    * newer modifier interface deprecates the older usage flags newer modifier
-    * interface deprecates the older usage flags.
+    * newer modifier interface deprecates the older usage flags.
     */
    assert(!(use && count));