Remove empty builders initialization

Revert part of 44c5145 change

Author: RazvanLiviuVarzaru

master-migration/master.cfg

@@ -196,8 +196,6 @@ c["builders"].extend(
 ##                           DEBUG BUILDERS                            ##
 ## ------------------------------------------------------------------- ##
 
-
-c["builders"] = []
 c["builders"].append(
     GenericBuilder(
         name="amd64-openssl3-fips",