Fix ssh box hung issue (#2172)

Co-authored-by: மனோஜ்குமார் பழனிச்சாமி <smartmanoj42857@gmail.com>

opendevin/runtime/docker/ssh_box.py

@@ -403,9 +403,6 @@ class DockerSSHBox(Sandbox):
         # cd to workspace
         self.ssh.sendline(f'cd {self.sandbox_workspace_dir}')
         self.ssh.prompt()
-        # load bashrc
-        self.ssh.sendline('source ~/.bashrc')
-        self.ssh.prompt()
 
     def get_exec_cmd(self, cmd: str) -> list[str]:
         if self.run_as_devin: