perf: relax garbage collection at start of init

Garbage collection is now relaxed at startup, decreasing startup time
by around ~0.75 seconds. Deleted lisp/performance.el as no longer needed.

init.el

@@ -7,6 +7,9 @@
 ;;
 ;;; Code:
 
+;; Increase the threshold - performance
+(setq gc-cons-threshold (* 50 1000 1000))
+
 ;; Disable Emacs' GTK decorations. Done in this file otherwise done too late.
 (tool-bar-mode -1)
 (scroll-bar-mode -1)
@@ -47,7 +50,6 @@
 (load "editor")
 (load "org-mode")
 (load "keybinds")
-(load "performance")
 (load "languages")
 
 ;; Load user configuration

lisp/performance.el

@@ -1,12 +0,0 @@
-;;; lisp/performance.el --- Performance improvements for Emacs -*- lexical-binding: t; -*-
-;;; Commentary:
-;;
-;; Emacs is widely known to be one of the slower editors - despite the
-;; great 'native compilation' or the daemon-client relationship.  So that needs to change too.
-;;
-;;; Code:
-
-;; Increase the threshold
-(setq gc-cons-threshold (* 50 1000 1000))
-
-;;; performance.el ends here