Revert "Reland "add opentelemetry tracing to emerge""

This reverts commit 93fdf5c22b3a1eb14bb64687d07f9ce6db58599e.

Reason for revert: regression testing with cl-perf. Monitoring for build
speed shows a regression starting around 7/18, so this is an effort to
test whether the build speed could be attributed to OpenTelemetry
behavior in Portage.

BUG=b:293494359
TEST=cros workon --host start sys-apps/portage && \
cros workon start sys-apps/portage -b amd64-generic && \
cros build-packages --board=amd64-generic
TEST=boards build successfully locally

Change-Id: I9285ee19527c1f41a4f3a9b892552e1376be1180
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/portage_tool/+/4726491
Tested-by: Lee Presland <zland@google.com>
Reviewed-by: Alex Klein <saklein@chromium.org>
Commit-Queue: Lee Presland <zland@google.com>
13 files changed