Major optimization refactor, across the board

+ enable lexical-scope everywhere (lexical-binding = t): ~5-10% faster
  startup; ~5-20% general boost
+ reduce consing, function calls & garbage collection by preferring
  cl-loop & dolist over lambda closures (for mapc[ar], add-hook, and
  various cl-lib filter/map/reduce functions) -- where possible
+ prefer functions with dedicated opcodes, like assq (see byte-defop's
  in bytecomp.el for more)
+ prefer pcase & cond (faster) over cl-case
+ general refactor for code readability
+ ensure naming & style conventions are adhered to
+ appease byte-compiler by marking unused variables with underscore
+ defer minor mode activation to after-init, emacs-startup or
  window-setup hooks; a customization opportunity for users + ensures
  custom functionality won't interfere with startup.

modules/completion/company/config.el

@@ -1,12 +1,11 @@
-;;; completion/company/config.el
+;;; completion/company/config.el -*- lexical-binding: t; -*-
 
 (def-setting! :company-backend (modes backends)
   "Register company BACKENDS to MODES."
   (let* ((modes (if (listp modes) modes (list modes)))
          (backends (if (listp backends) backends (list backends)))
          (def-name (intern (format "doom--init-company-%s"
-                                   (mapconcat #'identity (mapcar #'symbol-name modes) "-"))))
-         (quoted (eq (car-safe backends) 'quote)))
+                                   (mapconcat #'identity (mapcar #'symbol-name modes) "-")))))
     ;; TODO more type checks
     `(prog1
          (defun ,def-name ()