Don't disable cua-mode in pdf-view-mode

This mode is global. We can't pretend it's buffer local.

modules/tools/pdf/config.el

@@ -40,9 +40,6 @@
                            props))))
         (apply orig-fn args))))
 
-  ;; Turn off cua so copy works
-  (add-hook! 'pdf-view-mode-hook (cua-mode 0))
-
   ;; Handle PDF-tools related popups better
   (set-popup-rules!
     '(("^\\*Outline*" :side right :size 40 :select nil)