Fix evil-window "c" binding

Instead of relying on the optional ":ui workspaces" feature, the
built-in evil-window-delete is used. ":ui workspaces" remaps the
evil-window-delete already, so no functionality is lost for users of
that feature.

Fixes https://github.com/hlissner/doom-emacs/issues/1640.

modules/config/default/+evil-bindings.el

@@ -140,7 +140,6 @@
         "C-r"     #'winner-redo
         "o"       #'doom/window-enlargen
         ;; Delete window
-        "c"       #'+workspace/close-window-or-workspace
         "C-C"     #'ace-delete-window)
 
       ;; Plugins