no need to delete v in unwrap/_unwrap_error

Author: graingert

src/outcome/_impl.py

@@ -180,10 +180,7 @@ def unwrap(self) -> ValueT:
             pass
         else:
             object.__delattr__(self, "value")
-            try:
-                return v
-            finally:
-                del v
+            return v
         raise AlreadyUsedError
 
     def send(self, gen: Generator[ResultT, ValueT, object]) -> ResultT:
@@ -218,10 +215,7 @@ def _unwrap_error(self) -> BaseException:
             pass
         else:
             object.__delattr__(self, "error")
-            try:
-                return v
-            finally:
-                del v
+            return v
         raise AlreadyUsedError
 
     def unwrap(self) -> NoReturn: