fix: removing extraneous bits from guava exmaple yaml (#3404)
fix: removing extraneous bits from guava exmaple yaml (#3404)

Simplifying even more from the base example yaml, guava doesn't actually
need any pom modification because they specify `maven-compiler-plugin`
already.  Additionally I don't know why I had two separate actions there
isntead of just doing `compile` and `compile-test` at the same time, but
fix that too.
kythe/kythe,kythe/kythe,kythe/kythe,kythe/kythe,kythe/kythe,kythe/kythe,kythe/kythe,kythe/kythe,kythe/kythe,kythe/kythe,kythe/kythe