[pantsd] Kill dead method. (#5263)
[pantsd] Kill dead method. (#5263)

Remove an unused method seen by Stu.
pantsbuild/pants,baroquebobcat/pants,tdyas/pants,foursquare/pants,wisechengyi/pants,wisechengyi/pants,twitter/pants,UnrememberMe/pants,baroquebobcat/pants,benjyw/pants,UnrememberMe/pants,jsirois/pants,twitter/pants,pantsbuild/pants,foursquare/pants,wisechengyi/pants,baroquebobcat/pants,benjyw/pants,UnrememberMe/pants,baroquebobcat/pants,tdyas/pants,foursquare/pants,wisechengyi/pants,tdyas/pants,benjyw/pants,pantsbuild/pants,tdyas/pants,baroquebobcat/pants,wisechengyi/pants,wisechengyi/pants,foursquare/pants,twitter/pants,jsirois/pants,benjyw/pants,benjyw/pants,pantsbuild/pants,UnrememberMe/pants,tdyas/pants,tdyas/pants,twitter/pants,UnrememberMe/pants,twitter/pants,tdyas/pants,UnrememberMe/pants,wisechengyi/pants,wisechengyi/pants,UnrememberMe/pants,wisechengyi/pants,pantsbuild/pants,foursquare/pants,twitter/pants,baroquebobcat/pants,benjyw/pants,baroquebobcat/pants,twitter/pants,foursquare/pants,tdyas/pants,foursquare/pants,benjyw/pants,tdyas/pants,jsirois/pants,foursquare/pants,twitter/pants,UnrememberMe/pants,UnrememberMe/pants,baroquebobcat/pants,foursquare/pants,pantsbuild/pants,pantsbuild/pants,baroquebobcat/pants,twitter/pants