[Blob] Removing & modifying unnecessary metrics

R=mek@chromium.org,mpearson@chromium.org

Bug: 864328
Change-Id: I0726e315cd45d98d2490b64252b8c9dbc2b3d0bd
Reviewed-on: https://chromium-review.googlesource.com/c/1318441
Reviewed-by: Mark Pearson <mpearson@chromium.org>
Reviewed-by: Marijn Kruisselbrink <mek@chromium.org>
Commit-Queue: Daniel Murphy <dmurph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616463}
4 files changed