Revert "Add benchmark for message unpacking"

This reverts commit dc4eddaf9acd873ba8efd68e467cc9286f4591af.
Revert "Share the message buffer if we have room"

This reverts commit 17ce0cd52fbd64f62638ae0bdb7c3a6a07d4d0be.
Revert "Fix benchmark alignment"

This reverts commit 008dfb4ee81e8a0bf7cee3ee59dc87d5bc02aac7.
Revert "Add more benchmarks"

This reverts commit 5a3bf3d74996d4be97ff6ab5e27699f90ef42d39.