Move startup optimizations into init.el

Doesn't really belong in core.el and only applies to interactive
sessions.

core/core.el

@@ -112,32 +112,6 @@ else (except for `window-setup-hook').")
 (defvar doom--stage 'init)
 
 
-;;
-;; Optimize startup
-;;
-
-(defvar doom--file-name-handler-alist file-name-handler-alist)
-(unless (or after-init-time noninteractive)
-  ;; A big contributor to long startup times is the garbage collector, so we up
-  ;; its memory threshold, temporarily and reset it later in `doom|finalize'.
-  (setq gc-cons-threshold 402653184
-        gc-cons-percentage 1.0
-        ;; consulted on every `require', `load' and various file reading
-        ;; functions. You get a minor speed up by nooping this.
-        file-name-handler-alist nil))
-
-(defun doom|finalize ()
-  "Resets garbage collection settings to reasonable defaults (if you don't do
-this, you'll get stuttering and random freezes) and resets
-`file-name-handler-alist'."
-  (setq file-name-handler-alist doom--file-name-handler-alist
-        gc-cons-threshold 16777216
-        gc-cons-percentage 0.2))
-
-(add-hook 'emacs-startup-hook #'doom|finalize)
-(add-hook 'doom-reload-hook   #'doom|finalize)
-
-
 ;;
 ;; Emacs core configuration
 ;;