Revert "Add a histogram (Net.PacResultForStrippedUrl) that estimates how often PAC scripts depend on the URL path."

This reverts commit 183f4bcddd821b4af3f6234ad2e8c371694a9ffb.

Review URL: https://codereview.chromium.org/1944983002 .

Cr-Commit-Position: refs/branch-heads/2704@{#361}
Cr-Branched-From: 6e53600def8f60d8c632fadc70d7c1939ccea347-refs/heads/master@{#386251}
8 files changed