Revert support for snapshot_at in get_from_db

src/cal_tools/tools.py

@@ -461,7 +461,6 @@ def get_from_db(karabo_id: str, karabo_da: str,
                 empty_constant: np.array,
                 cal_db_interface: str,
                 creation_time: Optional[datetime.datetime] = None,
-                snapshot_at: Optional[datetime.datetime] = None,
                 verbosity: int = 1,
                 timeout: int = 30000,
                 ntries: int = 7,
@@ -508,9 +507,6 @@ def get_from_db(karabo_id: str, karabo_da: str,
         if creation_time is not None and hasattr(creation_time, 'isoformat'):
             when = creation_time.isoformat()
 
-        if snapshot_at is not None and hasattr(snapshot_at, 'isoformat'):
-            snapshot_at = snapshot_at.isoformat()
-
         metadata.calibration_constant_version.karabo_id = karabo_id
         metadata.calibration_constant_version.karabo_da = karabo_da
 
@@ -526,8 +522,7 @@ def get_from_db(karabo_id: str, karabo_da: str,
                 r = metadata.retrieve(this_interface, timeout=timeout,
                                       when=when, meta_only=meta_only,
                                       version_info=version_info,
-                                      strategy=strategy,
-                                      snapshot_at=snapshot_at)
+                                      strategy=strategy)
                 if version_info:
                     return r
                 break