cmd/compile: remove unused offset calculation in ssagen#rtcall
This offR accumulation isn't used and some really similar code is done
later in the Load results block.
Change-Id: I2f77a7bfd568e7e5eb9fc519e7c552401b3af9b8
GitHub-Last-Rev:
2c91e5c8987d21203c494f278ff1e05aa3941211
GitHub-Pull-Request: golang/go#52316
Reviewed-on: https://go-review.googlesource.com/c/go/+/400094
Run-TryBot: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>