[TIDY FIRST] Fix typing issues in dbt/core/tasks/clean.py (#10617)

.changes/unreleased/Under the Hood-20240827-114810.yaml

@@ -0,0 +1,6 @@
+kind: Under the Hood
+body: Fix type errors in `dbt/core/task/clean.py`
+time: 2024-08-27T11:48:10.438173-05:00
+custom:
+  Author: QMalcolm
+  Issue: "10616"

core/dbt/deprecations.py

@@ -138,7 +138,7 @@ def cb():
     return cb
 
 
-def warn(name, *args, **kwargs):
+def warn(name: str, *args, **kwargs) -> None:
     if name not in deprecations:
         # this should (hopefully) never happen
         raise RuntimeError("Error showing deprecation warning: {}".format(name))

core/dbt/task/clean.py

@@ -16,7 +16,7 @@ def __init__(self, args: Flags, config: Project):
         self.config = config
         self.project = config
 
-    def run(self):
+    def run(self) -> None:
         """
         This function takes all the paths in the target file
         and cleans the project paths that are not protected.