[firebase-release] Removed change log and reset repo after 15.17.0 release

Author: google-oss-bot

CHANGELOG.md

@@ -1,9 +0,0 @@
-- Added support for creating search indexes for Firestore. (#10431)
-- Fixed an issue where some MCP tools would error with "Invalid input: expected record, received array". (#10437)
-- Fixed an issue causing errors when multiple Firestore databases were configured in `firebase.json` (#8114)
-- Updated the Firebase Data Connect local toolkit to v3.4.7, which includes the following changes: (#10461)
-  - Fix emulator crash when using `uuidv4()` on operations.
-  - Support for `_Data` input types as variables with `@allow(fields, maxCount)` to constraint the input JSON, enabling batch mutations in admin SDK. Client SDK support will come soon.
-- Increase supported range for Next.js to version 16.0 (#9463)
-- Updated Cloud Function default resource locations. This does not affect existing functions. (#10414)
-- Added warning for cross-region event triggers (#10408)