refactor: simplify error handling in get_tracked_files method

aider/main.py

@@ -17,7 +17,7 @@ from aider.format_settings import format_settings, scrub_sensitive_info
 from aider.history import ChatSummary
 from aider.io import InputOutput
 from aider.llm import litellm  # noqa: F401; properly init litellm on launch
-from aider.repo import ANY_GIT_ERROR, GitRepo, UnableToCountRepoFiles
+from aider.repo import ANY_GIT_ERROR, GitRepo
 from aider.report import report_uncaught_exceptions
 from aider.versioncheck import check_version, install_from_main_branch, install_upgrade
 
@@ -301,7 +301,7 @@ def sanity_check_repo(repo, io):
     try:
         repo.get_tracked_files()
         return True
-    except UnableToCountRepoFiles as exc:
+    except ANY_GIT_ERROR as exc:
         error_msg = str(exc)
 
         if "version in (1, 2)" in error_msg:

aider/repo.py

@@ -10,11 +10,6 @@ from aider.sendchat import simple_send_with_retries
 
 from .dump import dump  # noqa: F401
 
-
-class UnableToCountRepoFiles(Exception):
-    pass
-
-
 ANY_GIT_ERROR = (git.exc.ODBError, git.exc.GitError)
 
 
@@ -258,7 +253,6 @@ class GitRepo:
         if not self.repo:
             return []
 
-        try:
         try:
             commit = self.repo.head.commit
         except ValueError:
@@ -283,8 +277,6 @@ class GitRepo:
         res = [fname for fname in files if not self.ignored_file(fname)]
 
         return res
-        except Exception as e:
-            raise UnableToCountRepoFiles(f"Error getting tracked files: {str(e)}")
 
     def normalize_path(self, path):
         orig_path = path