Revert "feat(emacs): add copilot"

This reverts commit 342e0ac.

Trial period ran out :(

Author: gekoke

modules/nixos/programs/emacs/init.el

@@ -628,14 +628,6 @@
   :config
   (global-treesit-auto-mode))
 
-(use-package copilot
-  :init
-  (add-hook 'prog-mode-hook 'copilot-mode)
-  :general
-  (general-def copilot-completion-map
-    "TAB" #'copilot-accept-completion
-    "<tab>" #'copilot-accept-completion))
-
 (use-package yasnippet)
 
 (use-package lsp-mode