Remove currently unused self._log

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: JOJ0

beetsplug/lastgenre/loaders.py

@@ -36,7 +36,6 @@ class DataFileLoader:
 
     def __init__(
         self,
-        log: Logger,
         whitelist: Whitelist,
         c14n_branches: CanonTree,
         canonicalize: bool,
@@ -45,7 +44,6 @@ def __init__(
 
         Use from_config() classmethod to construct from plugin config.
         """
-        self._log = log
         self.whitelist = whitelist
         self.c14n_branches = c14n_branches
         self.canonicalize = canonicalize
@@ -78,7 +76,7 @@ def from_config(
             config["prefer_specific"].get(bool),
         )
 
-        return cls(log, whitelist, c14n_branches, canonicalize)
+        return cls(whitelist, c14n_branches, canonicalize)
 
     @staticmethod
     def _load_whitelist(