remote: ssh: connection: remove open_max_sftp_channels

dvc/remote/ssh/connection.py

@@ -289,15 +289,3 @@ class SSHConnection:
     def cp(self, src, dest):
         self.makedirs(posixpath.dirname(dest))
         self.execute("cp {} {}".format(src, dest))
-
-    def open_max_sftp_channels(self):
-        # If there are more than 1 it means we've already opened max amount
-        if len(self._sftp_channels) <= 1:
-            while True:
-                try:
-                    self._sftp_channels.append(self._ssh.open_sftp())
-                except paramiko.ssh_exception.ChannelException:
-                    if not self._sftp_channels:
-                        raise
-                    break
-        return self._sftp_channels