Simplify doom/version output

Only really needs to output Doom's version and build info.

core/autoload/debug.el

@@ -201,16 +201,10 @@ ready to be pasted in a bug report on github."
   "Display the current version of Doom & Emacs, including the current Doom
 branch and commit."
   (interactive)
-  (require 'vc-git)
   (let ((default-directory doom-core-dir))
-    (print! "Doom v%s (%s)\nEmacs v%s\nBranch: %s\nBuild date: %s"
+    (print! "Doom v%s (%s)"
             doom-version
-            (or (vc-git-working-revision doom-core-dir)
-                "n/a")
-            emacs-version
-            (or (vc-git--symbolic-ref doom-core-dir)
-                "n/a")
-            (or (cdr (doom-call-process "git" "log" "-1" "--format=%ci"))
+            (or (cdr (doom-call-process "git" "log" "-1" "--format=%D %h %ci"))
                 "n/a"))))
 
 ;;;###autoload