[drop] plugin HTTPS rewrite - rule base is to old (update is to big)

The usefulness of the _HTTPS rewrite_ plugin is questionable:

- the 36 rule files have not been updated since 2015 [1]
- actual there are 23760 rule files in the https-everywhere repo [2]

For the first, we can remove this plugin.  For a complete new implementation, it
might be good to know that there is a project "https-everywhere : Privacy for
Pythons" [3]

related:  https://github.com/return42/searx-next/issues/8

[1] https://github.com/return42/searx-next/tree/d187a1d/searx/plugins/https_rules
[2] https://github.com/EFForg/https-everywhere/tree/master/src/chrome/content/rules
[3] https://github.com/jayvdb/https-everywhere-py



Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>