Remove the RADV_GFX103=1 from the env vars

roles/mesa/tasks/main.yml

@@ -17,15 +17,6 @@
     that: "'.' in mesa_ver.stdout.split('-')[-1]"
     fail_msg: "Installed {{ mesa_ver.stdout }}: expected a bc250-cachyos pkgrel like 1.67."
 
-# The gfx103 patch is opt-in and off by default. Without this the device
-# stays GFX10.1 and mesh/task shaders are not exposed.
-- name: Enable the GFX10.3 promotion globally
-  become: true
-  ansible.builtin.lineinfile:
-    path: /etc/environment
-    regexp: '^RADV_GFX103='
-    line: 'RADV_GFX103=1'
-
 # Pin last: IgnorePkg outranks the repo/pkg syntax, so writing it before
 # the install would make pacman prompt instead of proceeding.
 - name: Pin the Mesa stack against upstream upgrades