[11u] RFR: 8059241: C2: Excessive RemoveUseless passes during incremental inlining

[Roland Westrelin]

> We backported this patch because we noticed increased compilation
> overhead after we increased MaxInlineDepth to 15. We've been running
> with it (and the follow-on patches) in production starting with 11.0.9
> (last October) with no issues. At our scale, even relatively small
> improvements help reduce fleet costs.

FWIW, backporting the patch seems reasonable to me.

Roland.