cmd/compile: remove post-inlining PGO graph dump

The RedirectEdges logic is fragile and not quite complete (doesn't
update in-edges), which adds overhead to maintaining this package.

In my opinion, the post-inlining graph doesn't provide as much value as
the pre-inlining graph. Even the latter I am not convinced should be in
the compiler rather than an external tool, but it is comparatively
easier to maintain.

Drop it for now. Perhaps we'll want it back in the future for tracking
follow-up optimizations, but for now keep things simple.

Change-Id: I3133a2eb97893a14a6770547f96a3f1796798d17
Reviewed-on: https://go-review.googlesource.com/c/go/+/494655
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Michael Pratt <mpratt@google.com>

0 files changed, 0 insertions, 0 deletions