bug#33939: 26.1; Avoid loading libs eagerly or unnecessarily in mhtml-mode/sgml-mode

[Leo Liu]

On 2019-01-07 05:37 +0200, Eli Zaretskii wrote:
> I don't mind, of course, but if you want this to go to the release
> branch, please show the proposed patch.
>
> Thanks.

Should have attached it in the first place. This single line change
delivers the most speed up.

diff --git a/lisp/textmodes/css-mode.el b/lisp/textmodes/css-mode.el
index 016f0e8f..67a0c9f7 100644
--- a/lisp/textmodes/css-mode.el
+++ b/lisp/textmodes/css-mode.el
@@ -32,7 +32,6 @@
 
 ;;; Code:
 
-(require 'eww)
 (require 'cl-lib)
 (require 'color)
 (require 'seq)