Revert unique `unsafe_html` error codes (#2194)
Revert unique `unsafe_html` error codes (#2194)

* bump analyzer dep

* Revert "bump analyzer dep"

This reverts commit ab2c9a6335fa9524b0ad6b5d939a14ecf9919d65.

* revert unique security codes (for unsafe_html)
dart-lang/linter,dart-lang/linter