cmake-mode.el: drop reserved keybindings (#14576)

The keybindings added by commit 301e67e3 (cmake-mode.el: add local
keybindings, 2012-09-20) overlap the reserved C-c space:

 http://www.gnu.org/software/emacs/manual/html_node/elisp/Key-Binding-Conventions.html

Revert the commit to drop them.

Reported-by: Paul Smith <[email protected]>
Reviewed-by: Eric NOULARD <[email protected]>

Auxiliary/cmake-mode.el

@@ -230,26 +230,13 @@ the indentation.  Otherwise it retains the same position on the line"
 ;;
 (defvar cmake-tab-width 2)
 
-;;
-;; Keymap.
-;;
-(defvar cmake-mode-map
-  (let ((map (make-sparse-keymap)))
-    (define-key map "\C-ch" 'cmake-help-command)
-    (define-key map "\C-cl" 'cmake-help-list-commands)
-    (define-key map "\C-cu" 'unscreamify-cmake-buffer)
-    map)
-  "Keymap used in cmake-mode buffers.")
-
 ;------------------------------------------------------------------------------
 
 ;;
 ;; CMake mode startup function.
 ;;
 (defun cmake-mode ()
-  "Major mode for editing CMake listfiles.
-
-\\{cmake-mode-map}"
+  "Major mode for editing CMake listfiles."
   (interactive)
   (kill-all-local-variables)
   (setq major-mode 'cmake-mode)
@@ -276,9 +263,6 @@ the indentation.  Otherwise it retains the same position on the line"
   (make-local-variable 'comment-start)
   (setq comment-start "#")
 
-  ; Setup keymap.
-  (use-local-map cmake-mode-map)
-
   ; Run user hooks.
   (run-hooks 'cmake-mode-hook))