Revert "Still need to use parallel for pytype as pytype uses lots of memory."
Revert "Still need to use parallel for pytype as pytype uses lots of memory."

This reverts commit 13639dc04ec64895073bec0cfc8b9370169e3abe.

gizmoguy/faucet,REANNZ/faucet,anarkiwi/faucet,gizmoguy/faucet,trentindav/faucet,shivarammysore/faucet,REANNZ/faucet,trungdtbk/faucet,faucetsdn/faucet,trungdtbk/faucet,shivarammysore/faucet,anarkiwi/faucet,mwutzke/faucet,faucetsdn/faucet,trentindav/faucet,mwutzke/faucet