dashboard: remove known issue for GO386=softfloat builder
dashboard: remove known issue for GO386=softfloat builder

The builder is producing expected results.

Fixes golang/go#41840.
For golang/go#41848.

Change-Id: I08de0457b5ead7ac5dcc15edb95517f0f3e377fe
Reviewed-on: https://go-review.googlesource.com/c/build/+/261097
Trust: Dmitri Shuralyov <d181b7fea0ec87c86ba5a890ab716db52498e3ba@golang.org>
Run-TryBot: Dmitri Shuralyov <d181b7fea0ec87c86ba5a890ab716db52498e3ba@golang.org>
TryBot-Result: Go Bot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Keith Randall <8c99c3a9284e493be632950b84cd789d08ed3e9d@golang.org>

golang/build,golang/build,golang/build,golang/build