Reset release notes

Signed-off-by: cwasicki <[email protected]>

Author: cwasicki

RELEASE_NOTES.md

@@ -2,13 +2,11 @@
 
 ## Summary
 
-> **Warning:** This client is compatible *only* with Reporting API `v1alpha10` or later.
-> Using with services that use an older API version **will cause failures**.
+<!-- Here goes a general summary of what this release is about -->
 
 ## Upgrading
 
-* Breaking change to reporting API v1alpha10.
-* Switch to new `metrics` package from client-common.
+<!-- Here goes notes on how to upgrade from previous versions, including deprecations and what they should be replaced with -->
 
 ## New Features