fix new linting issues from pylint 2.16

.pylintrc

@@ -13,6 +13,6 @@ ignored-classes=NominatimArgs,closing
 # 'too-many-ancestors' is triggered already by deriving from UserDict
 # 'not-context-manager' disabled because it causes false positives once
 #   typed Python is enabled. See also https://github.com/PyCQA/pylint/issues/5273
-disable=too-few-public-methods,duplicate-code,too-many-ancestors,bad-option-value,no-self-use,not-context-manager
+disable=too-few-public-methods,duplicate-code,too-many-ancestors,bad-option-value,no-self-use,not-context-manager,use-dict-literal
 
 good-names=i,x,y,m,t,fd,db,cc

nominatim/api/results.py

@@ -11,7 +11,7 @@ Data classes are part of the public API while the functions are for
 internal use only. That's why they are implemented as free-standing functions
 instead of member functions.
 """
-from typing import Optional, Tuple, Dict, Sequence, Any
+from typing import Optional, Tuple, Dict, Sequence
 import enum
 import dataclasses
 import datetime as dt

nominatim/tools/migration.py

@@ -104,7 +104,7 @@ def _migration(major: int, minor: int, patch: int = 0,
         there.
     """
     def decorator(func: Callable[..., None]) -> Callable[..., None]:
-        version = (NominatimVersion(major, minor, patch, dbpatch))
+        version = NominatimVersion(major, minor, patch, dbpatch)
         _MIGRATION_FUNCTIONS.append((version, func))
         return func