Revert "Enh: make docker_internal_host configurable with default value (SWE-agent#266)"

This reverts commit e6d38e2.

Author: lurf21

src/swerex/deployment/config.py

@@ -45,12 +45,6 @@ class DockerDeploymentConfig(BaseModel):
     """The container runtime to use (docker or podman)."""
     exec_shell: list[str] = ["/bin/sh", "-c"]
     """The shell executable and arguments to use for running commands."""
-    docker_internal_host: str = "http://127.0.0.1"
-    """The host to use for connecting to the runtime.
-    In most cases you can leave this as-is, however for docker-in-docker
-    setups you might have to set it to http://host.docker.internal/ 
-    (see https://github.com/SWE-agent/SWE-ReX/issues/253 for more information).
-    """
 
     type: Literal["docker"] = "docker"
     """Discriminator for (de)serialization/CLI. Do not change."""

src/swerex/deployment/docker.py

@@ -271,12 +271,7 @@ async def start(self):
         self._hooks.on_custom_step("Starting runtime")
         self.logger.info(f"Starting runtime at {self._config.port}")
         self._runtime = RemoteRuntime.from_config(
-            RemoteRuntimeConfig(
-                host=self._config.docker_internal_host,
-                port=self._config.port,
-                timeout=self._runtime_timeout,
-                auth_token=token,
-            )
+            RemoteRuntimeConfig(port=self._config.port, timeout=self._runtime_timeout, auth_token=token)
         )
         t0 = time.time()
         await self._wait_until_alive(timeout=self._config.startup_timeout)