Cleaned up unused variables

model_server/process.py

@@ -14,8 +14,6 @@ def pad(yxcz, mpx: int):
     :return: np.ndarray array of size (mpx, mpx, nc, nz)
     """
     assert len(yxcz.shape) == 4
-    nc = yxcz.shape[2]
-    nz = yxcz.shape[3]
     dh = 0.5 * (mpx - yxcz.shape[0])
     dw = 0.5 * (mpx - yxcz.shape[1])