chore(git): remove git_submodules (unused)

Author: tony

libvcs/git.py

@@ -145,8 +145,6 @@ def __init__(self, url, repo_dir, **kwargs):
         """
         if 'git_shallow' not in kwargs:
             self.git_shallow = False
-        if 'git_submodules' not in kwargs:
-            self.git_submodules = []
         if 'tls_verify' not in kwargs:
             self.tls_verify = False
 
@@ -185,7 +183,6 @@ def obtain(self):
         self.info('Initializing submodules.')
         self.run(['submodule', 'init'], log_in_real_time=True)
         cmd = ['submodule', 'update', '--recursive', '--init']
-        cmd.extend(self.git_submodules)
         self.run(cmd, log_in_real_time=True)
 
     def update_repo(self):
@@ -335,7 +332,6 @@ def update_repo(self):
                 return
 
         cmd = ['submodule', 'update', '--recursive', '--init']
-        cmd.extend(self.git_submodules)
         self.run(cmd, log_in_real_time=True)
 
     def remotes(self, flat=False):