Revert "Enable `update_branch_immediately`"
Revert "Enable `update_branch_immediately`"

This reverts commit b0a020e8ef229cc324cbfd95540180044ed435bd.

zeit/next.js,JeromeFitz/next.js,flybayer/next.js,flybayer/next.js,azukaru/next.js,JeromeFitz/next.js,azukaru/next.js,azukaru/next.js,JeromeFitz/next.js,azukaru/next.js,flybayer/next.js,zeit/next.js,zeit/next.js,flybayer/next.js,JeromeFitz/next.js