Remove unused Tuples.kt. (#6529)
Remove unused Tuples.kt. (#6529)

b/172391055

Closes #6529

COPYBARA_INTEGRATE_REVIEW=https://github.com/polymerlabs/arcs/pull/6529 from shaper:rm_tuples 5dd4b2c8c8b7ad8717b0e32d133a7942178619b0
PiperOrigin-RevId: 341483238

PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs