cmd/compile: remove redundant parameter from finishcompare
cmd/compile: remove redundant parameter from finishcompare

This is follow-up 3 of 3 to CL 20959.

Passes toolstash -cmp.

Change-Id: I06efded21bbc970cbefa10e8f2cac1ebc6942e1b
Reviewed-on: https://go-review.googlesource.com/21054
Run-TryBot: Josh Bleecher Snyder <cdc248cc4d32e4fbfe04e45228163bcecd48a0b9@gmail.com>
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

polyverse-security/go,miolini/go,vsekhar/elastic-go,suncycheng/go,codestation/go,miolini/go,theif519/go,ganboing/go-esx,codestation/go,derekmarcotte/go,ganboing/go-esx,4ad/go,golang/go,4ad/go,goodlang/good,polyverse-security/go,akutz/go,suncycheng/go,linux-on-ibm-z/go,derekmarcotte/go,vanloswang/go,cloudflare/go,CAFxX/go,ganboing/go-esx,linux-on-ibm-z/go,CAFxX/go,theif519/go,josharian/go,cloudflare/go,goodlang/good,derekmarcotte/go,akutz/go,CAFxX/go,momchil-velikov/go,josharian/go,ImJasonH/go,suncycheng/go,golang/go,vsekhar/elastic-go,Cofyc/go,Cofyc/go,vanloswang/go,CAFxX/go,suncycheng/go,theif519/go,josharian/go,4ad/go,vanloswang/go,christopher-henderson/Go,miolini/go,momchil-velikov/go,vanloswang/go,golang/go,linux-on-ibm-z/go,polyverse-security/go,linux-on-ibm-z/go,akutz/go,4ad/go,golang/go,vsekhar/elastic-go,momchil-velikov/go,derekmarcotte/go,cloudflare/go,momchil-velikov/go,cloudflare/go,suncycheng/go,miolini/go,4ad/go,ImJasonH/go,ImJasonH/go,vanloswang/go,theif519/go,ganboing/go-esx,ImJasonH/go,miolini/go,CAFxX/go,4ad/go,nawawi/go,vanloswang/go,vsekhar/elastic-go,Cofyc/go,vsekhar/elastic-go,ganboing/go-esx,goodlang/good,goodlang/good,CAFxX/go,vsekhar/elastic-go,4ad/go,CAFxX/go,linux-on-ibm-z/go,akutz/go,codestation/go,ImJasonH/go,polyverse-security/go,Cofyc/go,Cofyc/go,4ad/go,goodlang/good,miolini/go,golang/go,linux-on-ibm-z/go,goodlang/good,ganboing/go-esx,golang/go,Cofyc/go,cloudflare/go,vsekhar/elastic-go,vanloswang/go,suncycheng/go,miolini/go,derekmarcotte/go,linux-on-ibm-z/go,theif519/go,codestation/go,polyverse-security/go,akutz/go,ganboing/go-esx,ImJasonH/go,nawawi/go,derekmarcotte/go,theif519/go,momchil-velikov/go,theif519/go,polyverse-security/go,polyverse-security/go,josharian/go,ImJasonH/go,akutz/go,goodlang/good,nawawi/go,nawawi/go,ImJasonH/go,codestation/go,polyverse-security/go,nawawi/go,miolini/go,cloudflare/go,golang/go,josharian/go,vanloswang/go,suncycheng/go,josharian/go,cloudflare/go,ganboing/go-esx,derekmarcotte/go,goodlang/good,linux-on-ibm-z/go,suncycheng/go,momchil-velikov/go,cloudflare/go,derekmarcotte/go,josharian/go,nawawi/go,golang/go,Cofyc/go,codestation/go,josharian/go,codestation/go,Cofyc/go,momchil-velikov/go,CAFxX/go,vsekhar/elastic-go,codestation/go,akutz/go,nawawi/go,momchil-velikov/go,theif519/go,akutz/go,nawawi/go