removed some redundancies

src/crewai/knowledge/source/base_file_knowledge_source.py

@@ -71,28 +71,24 @@ class BaseFileKnowledgeSource(BaseKnowledgeSource, ABC):
     def _process_file_paths(self) -> List[Path]:
         """Convert file_path to a list of Path objects."""
 
-        # Check if old file_path is being used
+        paths = None
         if hasattr(self, "file_path") and self.file_path is not None:
             self._logger.log(
                 "warning",
                 "The 'file_path' attribute is deprecated and will be removed in a future version. Please use 'file_paths' instead.",
                 color="yellow",
             )
-            paths = (
-                [self.file_path]
-                if isinstance(self.file_path, (str, Path))
-                else self.file_path
-            )
+            paths = self.file_path
         else:
             if self.file_paths is None:
                 raise ValueError("Your source must be provided with a file_paths: []")
-            elif isinstance(self.file_paths, list) and len(self.file_paths) == 0:
-                raise ValueError("Empty file_paths are not allowed")
-            else:
-                paths = (
-                    [self.file_paths]
-                    if isinstance(self.file_paths, (str, Path))
-                    else self.file_paths
-                )
+            paths = self.file_paths
+
+        if isinstance(paths, (str, Path)):
+            paths = [paths]
+        elif not isinstance(paths, list):
+            raise ValueError(
+                "file_path/file_paths must be a Path, str, or a list of these types"
+            )
 
         return [self.convert_to_path(path) for path in paths]