rm the protocal stuff, only support https now

Author: matthewlouisbrockman

docs/git.mdx

@@ -171,7 +171,6 @@ await sandbox.git.dangerouslyAuthenticate({
   username: process.env.GIT_USERNAME,
   password: process.env.GIT_TOKEN,
   host: 'git.example.com',
-  protocol: 'https',
 })
 
 // After this, HTTPS git operations can use the stored credentials.
@@ -187,7 +186,6 @@ sandbox.git.dangerously_authenticate(
     username=os.environ.get('GIT_USERNAME'),
     password=os.environ.get('GIT_TOKEN'),
     host='git.example.com',
-    protocol='https',
 )
 
 # After this, HTTPS git operations can use the stored credentials.