[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

hashmap/hashmap.py

@@ -10,4 +10,4 @@ def get(self, key):
 
     def remove(self, key):
         if key in self.map:
-            del self.map[key]
+            del self.map[key]