[dev.ssa] test: remove extra tests from non-SSA builds
[dev.ssa] test: remove extra tests from non-SSA builds

non-SSA backends are all over the map as to whether nil checks
get removed or not.  amd64, 386, 386/387, arm are all subtly different.
Remove these extra checks for now, they are in nilptr3_ssa.go so they
won't get lost.

Change-Id: I2e0051f488fb2cb7278c6fdd44cb9d68b5778345
Reviewed-on: https://go-review.googlesource.com/19961
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

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