Stop using hypothesis for tests that don't need it.

swh/web/tests/api/views/test_content.py

swh/web/tests/api/views/test_directory.py

swh/web/tests/api/views/test_origin.py

swh/web/tests/api/views/test_person.py

swh/web/tests/api/views/test_release.py

swh/web/tests/api/views/test_revision.py

swh/web/tests/api/views/test_snapshot.py

swh/web/tests/browse/test_utils.py

swh/web/tests/common/test_service.py

swh/web/tests/data.py