egl/surfaceless: remove duplicate KHR_image_base enablement

Already set by the core code - dri2_create_screen/dri2_setup_screen

Cc: Chad Versace <chadversary@chromium.org>
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
diff --git a/src/egl/drivers/dri2/platform_surfaceless.c b/src/egl/drivers/dri2/platform_surfaceless.c
index 025aaa2..8811c84 100644
--- a/src/egl/drivers/dri2/platform_surfaceless.c
+++ b/src/egl/drivers/dri2/platform_surfaceless.c
@@ -322,8 +322,6 @@
       goto cleanup_screen;
    }
 
-   disp->Extensions.KHR_image_base = EGL_TRUE;
-
    /* Fill vtbl last to prevent accidentally calling virtual function during
     * initialization.
     */