QUIC - Delete Net.QuicClientHelloRejectReasons.Insecure histogram.
QUIC - Delete Net.QuicClientHelloRejectReasons.Insecure histogram.

It was deleted in the following CL:

https://codereview.chromium.org/1411063004/diff/300001/net/quic/crypto/quic_crypto_client_config.cc

R=asvitkine@chromium.org, rch@chromium.org
BUG=549278

Review URL: https://codereview.chromium.org/1408343007

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#356973}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk