fix(deps): drop pkg_resources (#744)

Author: parthea

google/cloud/storage/_http.py

@@ -15,20 +15,11 @@
 """Create / interact with Google Cloud Storage connections."""
 
 import functools
-import os
-import pkg_resources
 
 from google.cloud import _http
-
 from google.cloud.storage import __version__
 
 
-if os.getenv("GOOGLE_API_USE_CLIENT_CERTIFICATE") == "true": # pragma: NO COVER
- release = pkg_resources.get_distribution("google-cloud-core").parsed_version
- if release < pkg_resources.parse_version("1.6.0"):
- raise ImportError("google-cloud-core >= 1.6.0 is required to use mTLS feature")
-
-
 class Connection(_http.JSONConnection):
  """A connection to Google Cloud Storage via the JSON REST API. Mutual TLS feature will be
  enabled if `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable is set to "true".