[chore] Google (HTML) engine: remove obsolete GSA User-Agents (#6366)

The GSA headers that were introduced in PR #5644 unfortunately no longer
work (#6359).

The Google engines

- google.py
- google_videos.py

do not work anymore either, but we'll leave it in the code for now:

- In google.py, central functions like get_google_info(..) are provided, which
  are also used by other modules.
- We will probably need a Google HTML (and video) engine again very soon.

Related:

- https://github.com/searxng/searxng/issues/6359
- https://github.com/searxng/searxng/pull/6364

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

utils/lib_sxng_data.sh

@@ -7,7 +7,6 @@ data.:
   all           : update searx/sxng_locales.py and searx/data/*
   traits        : update searx/data/engine_traits.json & searx/sxng_locales.py
   useragents    : update searx/data/useragents.json with the most recent versions of Firefox
-  gsa_useragents: update searx/data/gsa_useragents.txt with compatible useragents
   locales       : update searx/data/locales.json from babel
   currencies    : update searx/data/currencies.json from wikidata
 EOF
@@ -20,7 +19,6 @@ data.all() {
         pyenv.activate
         data.traits
         data.useragents
-        data.gsa_useragents
         data.locales
 
         build_msg DATA "update searx/data/osm_keys_tags.json"
@@ -55,12 +53,6 @@ data.useragents() {
     dump_return $?
 }
 
-data.gsa_useragents() {
-    build_msg DATA "update searx/data/gsa_useragents.txt"
-    pyenv.cmd python searxng_extra/update/update_gsa_useragents.py
-    dump_return $?
-}
-
 data.locales() {
     (
         set -e