tree eddf26c3a3f46b46cf061e1b2f6db1ec5faaa855
parent 30f0ca73abcd4654af3a16118cb99da6fad07232
author jhorvitz <jhorvitz@google.com> 1624647048 -0700
committer Copybara-Service <copybara-worker@google.com> 1624647145 -0700

Delete wasteful method `checkForNullLabels`.

This method was added in 2010 (unknown commit, add diagnostic code for b/2210848) and is now completely useless. It iterates over two collections - one from `visitLabels` and one from `getOutputFiles`, both of which cannot possibly contain a null label. `visitLabels` explicitly filters out nulls (and `DepEdge` is an `AutoValue` type which requires a non-null label anyway). `OutputFile` requires a non-null label. So there's really no way for `checkForNullLabels` to catch anything.

PiperOrigin-RevId: 381516786