Remove the workaround that forces rebuilding recovery patch.

The issue has been addressed on releasetools script side, by specifying
UUID and AVB salt to get reproducible images [1].

[1] https://android-review.googlesource.com/c/platform/build/+/1135332

Fixes: 134525174
Test: `m dist` with a non-A/B target.
      `validate_target_files out/dist/target_files.zip` passes.
Change-Id: Ida6750291706036c9b0c192d8abcde6d65155287