Remove redundant note on HTTP Provider (#17595)

Since apache/airflow#16974 we have switched back to including HTTP provider and this comment now is not correct.

GitOrigin-RevId: f2a8a73ca99912d25e9cd8142038cf3a6df622d6

Author: kaxil

setup.py

@@ -340,14 +340,6 @@ def write_version(filename: str = os.path.join(*[my_dir, "airflow", "git_version
     'requests>=2.26.0',
 ]
 http_provider = [
-    # NOTE ! The HTTP provider is NOT preinstalled by default when Airflow is installed - because it
-    #        depends on `requests` library and until `chardet` is mandatory dependency of `requests`
-    #        See https://github.com/psf/requests/pull/5797
-    #        This means that providers that depend on Http and cannot work without it, have to have
-    #        explicit dependency on `apache-airflow-providers-http` which needs to be pulled in for them.
-    #        Other cross-provider-dependencies are optional (usually cross-provider dependencies only enable
-    #        some features of providers and majority of those providers works). They result with an extra,
-    #        not with the `install-requires` dependency.
     'apache-airflow-providers-http',
 ]
 jdbc = [