Drop BuildRequires on pytest-flake8, deselect a failing test

When updating to new Python version,
linting packages (such as flake8) are generally not ready early enough.

See https://bugzilla.redhat.com/show_bug.cgi?id=1958945 about the failing test.

python-httplib2.spec

@@ -2,7 +2,7 @@
 
 Name:           python-%{srcname}
 Version:        0.19.1
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        Comprehensive HTTP client library
 License:        MIT
 URL:            https://pypi.python.org/pypi/httplib2
@@ -27,7 +27,6 @@ BuildRequires:  python3-devel
 BuildRequires:  python3-setuptools
 BuildRequires:  python3-pytest
 BuildRequires:  python3-pytest-forked
-BuildRequires:  python3-pytest-flake8
 BuildRequires:  python3-pytest-timeout
 BuildRequires:  python3-six
 
@@ -59,7 +58,7 @@ PYTHONPATH=%{buildroot}%{python3_sitelib} pytest -k "not test_unknown_server \
 	test_invalid_ca_certs_path and not test_max_tls_version and not \
 	test_get_301_via_https and not test_client_cert_password_verified and not\
 	test_get_via_https and not test_min_tls_version and not\
-	test_client_cert_verified"
+	test_client_cert_verified and not test_inject_space"
 
 
 %files -n python3-%{srcname}
@@ -68,6 +67,11 @@ PYTHONPATH=%{buildroot}%{python3_sitelib} pytest -k "not test_unknown_server \
 %{python3_sitelib}/%{srcname}/
 
 %changelog
+* Thu May 13 2021 Miro Hrončok <mhroncok@redhat.com> - 0.19.1-2
+- Drop BuildRequires on pytest-flake8
+- Deselect failing test
+- Fixes: rhbz#1958945
+
 * Sat Apr 24 2021 Kevin Fenzi <kevin@scrye.com> - 0.19.1-1
 - Update to 0.19.1. Fixes rhbz#1944789