Avoid warnings module from metadata.py

which is also used in back-end code, where these warnings do not compose
well with logging

Author: soxofaan

openeo/metadata.py

@@ -2,7 +2,6 @@
 
 import functools
 import logging
-import warnings
 from typing import (
     Any,
     Callable,
@@ -540,7 +539,7 @@ def __init__(self, metadata: dict, dimensions: List[Dimension] = None, _federati
         self._federation = _federation
 
     @classmethod
-    def _parse_dimensions(cls, spec: dict, complain: Callable[[str], None] = warnings.warn) -> List[Dimension]:
+    def _parse_dimensions(cls, spec: dict, complain: Callable[[str], None] = _log.warning) -> List[Dimension]:
         """
         Extract data cube dimension metadata from STAC-like description of a collection.