DOC: update docs strings

src/caosdb/common/models.py

@@ -2437,8 +2437,9 @@ class Messages(list):
     """
 
     def clear_server_messages(self):
-        """Removes all messages of type error, warning and info."""
-        # TODO Why do we not remove ALL messages?
+        """Removes all messages of type error, warning and info. All other
+        messages types are custom types which should be handled by custom
+        code."""
         rem = []
 
         for m in self:

src/caosdb/utils/checkFileSystemConsistency.py

@@ -30,7 +30,6 @@ import caosdb as db
 
 from argparse import ArgumentParser
 from argparse import RawDescriptionHelpFormatter
-from _testcapi import raise_exception
 
 __all__ = []
 __version__ = 0.1