Remove deprecated function emit logic

[PathogenDavid]

https://github.com/MochiLibraries/Biohazrd/issues/236 fundamentally changed how functions are emitted by Biohazrd. For the time being I have both emit strategies implemented and the new trampoline emit strategy is only used if CreateTrampolinesTransformation is used in order to make it a bit easier to upgrade older generators and see how the new emit strategy affects their output.

This extra path represents a good 536 lines of effectively dead code though so it should be removed. I plan to do this with https://github.com/MochiLibraries/Biohazrd/issues/102 but I may still wait hence this issue.