Remove unused prototype.
Remove unused prototype.

mockingbirdnest/benchmark,disconnect3d/benchmark,mockingbirdnest/benchmark,disconnect3d/benchmark,codygray/benchmark,codygray/benchmark,disconnect3d/benchmark,efcs/benchmark,efcs/benchmark,efcs/benchmark,codygray/benchmark,everbase/benchmark,everbase/benchmark,google/benchmark,codygray/benchmark,mockingbirdnest/benchmark,everbase/benchmark,google/benchmark,mockingbirdnest/benchmark,disconnect3d/benchmark,efcs/benchmark,everbase/benchmark,google/benchmark