Replace Output with a local copy and remove all unused code

dvc/repo/ls_url.py

@@ -1,10 +1,39 @@
 from dvc.exceptions import URLMissingError
-from dvc.output import Output
+from dvc.fs import get_cloud_fs
+from dvc.output import OutputIsStageFileError
+
+
+class Output:
+    def __init__(
+        self,
+        path,
+        fs_config=None,
+    ):
+        fs_config = fs_config or {}
+        fs_cls, _fs_config, fs_path = get_cloud_fs(None, url=path, **fs_config)
+        self.fs = fs_cls(**_fs_config)
+        _validate_output_path(path)
+        self.fs_path = _parse_path(self.fs, fs_path)
+
+
+def _parse_path(fs, fs_path):
+    return fs.path.abspath(fs.path.normpath(fs_path))
+
+
+def _validate_output_path(path):
+    from dvc.dvcfile import is_valid_filename
+
+    if is_valid_filename(path):
+        raise OutputIsStageFileError(path)
+
+
+def get_external_fs(url, fs_config=None):
+    out = Output(url, fs_config)
+    return out.fs, out.fs_path
 
 
 def ls_url(url):
-    out = Output(None, url)
-    fs, fs_path = out.fs, out.fs_path
+    fs, fs_path = get_external_fs(url)
 
     try:
         info = fs.info(fs_path)