Merge pull request from belak/remove-extra-font-lock-keywords

GitHub-reference: https://github.com/jwiegley/use-package/issues/859

diff --cc lisp/use-package/use-package-core.el
index ab35131e4f4380e802339d0b5a9650ad3853aaa7,b5671ee249f630b221c338e10a7cfd20cb8b7363..0734dcf1c807bb1bdb6ee15d9bf6a1af39a1ae4d
--- 1/lisp/use-package/use-package-core.el
--- 2/lisp/use-package/use-package-core.el
+++ b/lisp/use-package/use-package-core.el
@@@ -324,17 -306,9 +324,10 @@@ Must be set before loading use-package.
                            (list "Packages" ,use-package-form-regexp-eval 2))
            `(setq lisp-imenu-generic-expression
                   (remove (list "Packages" ,use-package-form-regexp-eval 2)
 -                         lisp-imenu-generic-expression)))))
 +                         lisp-imenu-generic-expression))))
 +      (set-default sym value))
    :group 'use-package)
  
- (defconst use-package-font-lock-keywords
-   '(("(\\(use-package\\)\\_>[ \t']*\\(\\(?:\\sw\\|\\s_\\)+\\)?"
-      (1 font-lock-keyword-face)
-      (2 font-lock-constant-face nil t))))
- 
- (font-lock-add-keywords 'emacs-lisp-mode use-package-font-lock-keywords)
- 
  (defcustom use-package-compute-statistics nil
    "If non-nil, compute statistics concerned use-package declarations.
  View the statistical report using `use-package-report'. Note that