`methods_with_generators` undefined when running `SnoopCompile.write`

[StevenWhitaker]

Not quite a MRE, but the essence of the code was as follows:

tinf = @snoop_inference some_function()
(_, pcs) = SnoopCompile.parcel(tinf)
SnoopCompile.write("dir", pcs)

Sorry I forgot to grab the full stacktrace, but here's where methods_with_generators is called: https://github.com/timholy/SnoopCompile.jl/blob/d803b4e7a6ac65d344b4089d8aba3d08f2b7c96d/src/utils.jl#L96

Interestingly, the error occurred not immediately but after several statements like the following printed:

Base: precompiled 0.0013572730000000002 out of 0.003003319000000001

Hopefully it's just a missing import that's easy to fix, but if a better stacktrace is needed I can grab one.

EDIT: Upon further inspection, it appears this method was defined in earlier versions of SnoopCompile, but was removed for some reason.

[ararslan]

Looks like that function was removed in #384.