Drop support for deceased Github API v2

tools/gh_api.py

@@ -86,34 +86,20 def post_gist(content, description='', filename='file', auth=False):
     response_data = json.loads(response.text)
     return response_data['html_url']
     
-def get_pull_request(project, num, github_api=3):
+def get_pull_request(project, num):
     """get pull request info  by number
-
-    github_api : version of github api to use
     """
-    if github_api==2 :
-        url = "http://github.com/api/v2/json/pulls/{project}/{num}".format(project=project, num=num)
-    elif github_api == 3:
         url = "https://api.github.com/repos/{project}/pulls/{num}".format(project=project, num=num)
     response = requests.get(url)
     response.raise_for_status()
-    if github_api == 2 :
-        return json.loads(response.text)['pull']
     return json.loads(response.text, object_hook=Obj)
 
-def get_pulls_list(project, github_api=3):
+def get_pulls_list(project):
     """get pull request list
-
-    github_api : version of github api to use
     """
-    if github_api == 3 :
         url = "https://api.github.com/repos/{project}/pulls".format(project=project)
-    else :
-        url = "http://github.com/api/v2/json/pulls/{project}".format(project=project)
     response = requests.get(url)
     response.raise_for_status()
-    if github_api == 2 :
-        return json.loads(response.text)['pulls']
     return json.loads(response.text)
 
 # encode_multipart_formdata is from urllib3.filepost