fix(misc): do not enable explain-pause-mode automatically when emacs starts

Instead let it be a something that needs to be manually started. It
seems to make Emacs just that little slower overall.

modules/misc/siren-explain-pause.el

@@ -10,10 +10,7 @@
   :straight (:type git :host github :repo "lastquestion/explain-pause-mode")
 
   :custom
-  (explain-pause-blocking-too-long-ms 40)
-
-  :config
-  (explain-pause-mode))
+  (explain-pause-blocking-too-long-ms 40))
 
 (provide 'siren-explain-pause)
 ;;; siren-explain-pause.el ends here