[firebase-release] Removed change log and reset repo after 10.0.0 release

Author: google-oss-bot

CHANGELOG.md

@@ -1,5 +0,0 @@
-- **BREAKING** Drops support for running the CLI on Node 10.
-- **BREAKING** Replaces all usages of `-y`, `--yes`, or `--confirm` with `-f` and `--force`.
-- **BREAKING** Function deploys upload source to the deployed region instead of us-central1.
-- Requires firebase-functions >= 3.13.1 in Functions emulator to include bug fixes (#3851).
-- Updates default functions runtime to Node.js 16.