chore: remove google_search bot

Scraping google search results is no longer possible
due to google's anti-scraping measures. Projects that
previously depended on scraping google search results
have [moved away from it](benbusby/whoogle-search#1253).
Given that this bot also pulls in a large dep (lxml),
It seems preferable to remove it altogether.

Author: RoyalOughtness

tools/run-mypy

@@ -33,8 +33,6 @@ force_include = [
     "zulip_bots/zulip_bots/bots/giphy/test_giphy.py",
     "zulip_bots/zulip_bots/bots/github_detail/github_detail.py",
     "zulip_bots/zulip_bots/bots/github_detail/test_github_detail.py",
-    "zulip_bots/zulip_bots/bots/google_search/google_search.py",
-    "zulip_bots/zulip_bots/bots/google_search/test_google_search.py",
     "zulip_bots/zulip_bots/bots/help/help.py",
     "zulip_bots/zulip_bots/bots/help/test_help.py",
     "zulip_bots/zulip_bots/bots/incrementor/incrementor.py",

zulip_bots/setup.py

@@ -53,7 +53,6 @@
         "pip",
         "zulip",
         "html2text",
-        "lxml",
         "BeautifulSoup4",
         "typing_extensions>=4.5.0",
         "importlib-metadata>=3.6",