SR-15237 Fix typelayout_based_value_witness.swift
SR-15237 Fix typelayout_based_value_witness.swift

typelayout_based_value_witness.swift failed on iphoneos-arm64e due to an extra
line of IR that gets generated. That meant the swift_release line had '#7'
instead of '#6'. The test shouldn't be checking for '#6' anyways, so removed
that check which causes the test to now pass.

apple/swift,JGiola/swift,rudkx/swift,xwu/swift,benlangmuir/swift,gregomni/swift,xwu/swift,rudkx/swift,glessard/swift,gregomni/swift,roambotics/swift,atrick/swift,apple/swift,gregomni/swift,rudkx/swift,apple/swift,rudkx/swift,ahoppen/swift,roambotics/swift,roambotics/swift,rudkx/swift,ahoppen/swift,JGiola/swift,atrick/swift,roambotics/swift,benlangmuir/swift,xwu/swift,xwu/swift,atrick/swift,xwu/swift,glessard/swift,rudkx/swift,glessard/swift,xwu/swift,gregomni/swift,glessard/swift,apple/swift,atrick/swift,ahoppen/swift,JGiola/swift,apple/swift,ahoppen/swift,gregomni/swift,atrick/swift,glessard/swift,benlangmuir/swift,JGiola/swift,roambotics/swift,JGiola/swift,JGiola/swift,ahoppen/swift,benlangmuir/swift,ahoppen/swift,atrick/swift,benlangmuir/swift,roambotics/swift,apple/swift,xwu/swift,benlangmuir/swift,gregomni/swift,glessard/swift