[Passwords] Remove Logging Code for ShouldBlockPassword* Histogram

This change removes logging code for the PasswordManager.
ShouldBlockPasswordForSameOriginButDifferentScheme histogram and marks
the corresponding histogram as obsolete. The same information (and more)
can be obtained from the PasswordManager.ProvisionalSaveFailure
histogram.

Bug: 984301
Change-Id: I2ba4c5b438dfe01c34183e743a5f1addb2e17993
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1703403
Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Commit-Queue: Jan Wilken Dörrie <jdoerrie@chromium.org>
Cr-Commit-Position: refs/heads/master@{#678153}
5 files changed