[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>

searx/engines/google.py

@@ -32,7 +32,6 @@ from searx.utils import (
     eval_xpath_getindex,
     eval_xpath_list,
     extract_text,
-    # gen_gsa_useragent,
 )
 
 if t.TYPE_CHECKING:
@@ -268,11 +267,6 @@ def get_google_info(params: "OnlineParams", eng_traits: EngineTraits) -> dict[st
     # HTTP headers
 
     ret_val["headers"]["Accept"] = "*/*"
-    # GSA for iPhone useragent had been added in
-    # - https://github.com/searxng/searxng/pull/5644
-    # but doe no longer work
-    # - https://github.com/searxng/searxng/issues/6359
-    # ret_val["headers"]["User-Agent"] = gen_gsa_useragent()
 
     # Cookies