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

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

Author: pre-commit-ci[bot]

python/taichi/lang/_ndarray.py

@@ -62,12 +62,7 @@ def __getitem__(self, key):
 
     def __del__(self):
         rt = impl.get_runtime()
-        if (
-            self.arr is not None and
-            impl is not None and
-            rt is not None and
-            rt.prog is not None
-        ):
+        if self.arr is not None and impl is not None and rt is not None and rt.prog is not None:
             impl.get_runtime().prog.delete_ndarray(self.arr)
 
     @python_scope
@@ -253,7 +248,6 @@ def __init__(self, dtype, arr_shape):
         self.shape = tuple(self.arr.shape)
         self.element_type = dtype
 
-
     @property
     def element_shape(self):
         return ()