Inline method to make mypy happy

conda_lock/pypi_solver.py

@@ -415,13 +415,10 @@ def get_hash(self) -> HashModel:
         return self._get_hash_from_dependency() or self._get_hash_from_link()
 
     def _get_hash_from_dependency(self) -> Optional[HashModel]:
-        if self._dependency_provides_hash():
+        if isinstance(self.dependency, PoetryDependencyWithHash):
             return self.dependency.get_hash_model()
         return None
 
-    def _dependency_provides_hash(self) -> bool:
-        return isinstance(self.dependency, PoetryDependencyWithHash)
-
     def _get_hash_from_link(self) -> HashModel:
         hashes: Dict[str, str] = {}
         if self.link.hash_name is not None and self.link.hash is not None: