chore: rm redundant doc string regarding e2e-compatibility tests - te…

…sts now use annoations for compatibility checks

docs/dev/release-management.md

@@ -70,7 +70,6 @@ Additionally, for the first point release of a new major or minor release branch
 
 - Update the table of supported release lines (and End of Life dates) in [`RELEASES.md`](../../RELEASES.md): add the new release line and remove any release lines that might have become discontinued.
 - Update the [list of supported release lines in README.md](../../RELEASES.md#releases), if necessary.
-- Update the [e2e compatibility test matrices](https://github.com/cosmos/ibc-go/tree/main/.github/compatibility-test-matrices): add the tag for the new release and remove any tags that might not be recommended anymore.
 - Update the manual [e2e `simd`](https://github.com/cosmos/ibc-go/blob/main/.github/workflows/e2e-manual-simd.yaml) test workflow:
     - Remove any tags that might not be recommended anymore. 
 - Update docs site: