1240d760

By: Tom Sydney Kerckhove <syd@cs-syd.eu>

Rename RemoveGuard to ConstBool and add False replacement

The operator was misnamed — it replaces any Bool-typed expression with a
constant, not specifically guards. Renaming to ConstBool and extending it
to also replace with False doubles the mutation coverage for boolean conditions.

Suite timing

Time to Start Worker time Duration Time to finish
Config 0s 6s 6s 6s
Eval 7s 2m12s 2m12s 2m19s
Build 1m14s 16m13s 8m22s 9m37s
Test - - - -
Deploy - - - -
Suite 0s 18m32s 9m37s 9m37s