Simplify files property

torchgeo/datasets/geo.py

@@ -308,15 +308,13 @@ def files(self) -> list[Path]:
         files: set[Path] = set()
         for path in paths:
             file_not_found = True
-            if os.path.isfile(path):
-                if fnmatch.fnmatch(str(path), os.path.join('*', self.filename_glob)):
-                    files.add(path)
-                    file_not_found = False
+            if os.path.isfile(path) and fnmatch.fnmatch(
+                str(path), os.path.join('*', self.filename_glob)
+            ):
+                files.add(path)
             elif files_found := set(list_directory_recursive(path, self.filename_glob)):
                 files |= files_found
-                file_not_found = False
-
-            if file_not_found and not hasattr(self, 'download'):
+            elif file_not_found and not hasattr(self, 'download'):
                 warnings.warn(
                     f"Could not find any relevant files for provided path '{path}'. "
                     f'Path was ignored.',