Revert "testing: document -race goroutine limits"
This reverts commit
4907c62f99fbfc8608a79a17c20d89f50956d9fc.
Reason for revert: Race detector v3, which we just upgraded to, no longer has a goroutine limit.
(small caveat: openbsd/amd64 can't be updated, windows/amd64 isn't updated yet but should be by release time.)
Change-Id: I90017834501e81d3990d888f1b2baf3432452846
Reviewed-on: https://go-review.googlesource.com/c/go/+/405595
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Keith Randall <khr@google.com>
Run-TryBot: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Rob Pike <r@golang.org>