Revert "mergify: enable it only for feature-mergify"
Revert "mergify: enable it only for feature-mergify"

This reverts commit e4cd9387dc4b0dc93684322dfd783783da0fd322.

kjbracey-arm/mbed,andcor02/mbed-os,andcor02/mbed-os,mbedmicro/mbed,kjbracey-arm/mbed,mbedmicro/mbed,mbedmicro/mbed,andcor02/mbed-os,kjbracey-arm/mbed,kjbracey-arm/mbed,andcor02/mbed-os,andcor02/mbed-os,mbedmicro/mbed,andcor02/mbed-os,mbedmicro/mbed