Delete some dead code
Delete some dead code

RELNOTES=n/a

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=180669311

cgruber/dagger,ronshapiro/dagger,ze-pequeno/dagger,cgruber/dagger,google/dagger,ze-pequeno/dagger,cgruber/dagger,ronshapiro/dagger,dushmis/dagger,dushmis/dagger,google/dagger,ze-pequeno/dagger,google/dagger,google/dagger,ze-pequeno/dagger,ronshapiro/dagger