refactor!(debugger): remove dap-mode

BREAKING CHANGE: This removes dap-mode from the debugger module. Use
dape instead.

dap-mode was deprecated in b4bd368 when realgud was replaced with dape,
which has been excellent, so I want to focus this module's support on it
going forward.

Ref: b4bd368485

modules/tools/debugger/autoload/debugger.el

@@ -1,25 +1,13 @@
 ;;; tools/debugger/autoload/debugger.el -*- lexical-binding: t; -*-
 
 ;;;###autoload
-(defun +debugger/start ()
-  "Start a debugger in the current project and buffer."
-  (interactive)
-  (call-interactively
-   (if (and (modulep! +lsp)
-            (bound-and-true-p lsp-mode)
-            (require 'dap-mode nil t))
-       #'dap-debug
-     #'dape)))
+(defalias '+debugger/start #'dape)
 
 ;;;###autoload
 (defun +debugger/quit ()
   "Quit the active debugger session."
   (interactive)
-  (if-let* ((conn (and (modulep! +lsp)
-                       (require 'dap-mode nil t)
-                       (dap--cur-session))))
-      (dap-disconnect conn)
-    (if-let* ((conn (and (featurep 'dape)
-                         (dape--live-connection 'parent t))))
-        (dape-quit conn)
-      (user-error "No debugger session to quit"))))
+  (if-let* ((conn (and (featurep 'dape)
+                       (dape--live-connection 'parent t))))
+      (dape-quit conn)
+    (user-error "No debugger session to quit")))