[dev.regabi] cmd/compile: remove tempAssigns in walkCall1
[dev.regabi] cmd/compile: remove tempAssigns in walkCall1

Passes toolstash -cmp.

Change-Id: I588c663324443e02b901cda461b999ff192e150c
Reviewed-on: https://go-review.googlesource.com/c/go/+/284896
Run-TryBot: Cuong Manh Le <54b4457f1dff6823379654eb5867596497ba782f@gmail.com>
Trust: Cuong Manh Le <54b4457f1dff6823379654eb5867596497ba782f@gmail.com>
Reviewed-by: Matthew Dempsky <e56ac2c500064424afac424d4b5e53bd0570a731@google.com>

nawawi/go,CAFxX/go,golang/go,cloudflare/go,CAFxX/go,nawawi/go,golang/go,CAFxX/go,cloudflare/go,nawawi/go,CAFxX/go,cloudflare/go,cloudflare/go,golang/go,cloudflare/go,cloudflare/go,nawawi/go,cloudflare/go,CAFxX/go,CAFxX/go,nawawi/go,golang/go,cloudflare/go,golang/go,golang/go,CAFxX/go,nawawi/go,nawawi/go,nawawi/go,golang/go,CAFxX/go,golang/go