So it's not required to delete the pages before deploy the patch, right?
Yes. You can delete the pages via API after deployed patch.
But some pages cannot be deleted directly. For example: Template:blend. Pages listed in this list will be break after deployed patch, because zhwiktionary without Template:Blend. So, we must be move like Template:blend to Template:Blend.
Mentioned in SAL (#wikimedia-operations) [2018-07-23T11:32:46Z] <zfilipin@deploy1001> Synchronized wmf-config/InitialiseSettings.php: SWAT: [[gerrit:445975|Exempt Template and Module namespace on zhwiktionary (T187783)]] (duration: 00m 55s)