Remove nonexistent behaviors

These were each git grepped to confirm they don't exist
Point to correct tab destroy behavior

:on-destroy-eds never existed in this git repo - seems this should
be :on-destroy-objs since that is unused
:lt.objs.eval/destroy-on-clear behavior should be destroy-on-cleared

Was introduced erroneously on 2a8513542876af9902e47b6e21a4d41295df8a20
Remove unused top-level get-skins call

Seems like a repl artificat of 0d980a12b4c5be069b0a75fd5771c3804420ef37
Update result-menu! to point to result-menu+

Seems this was accidental when result-menu+ was introduced in 2239e7b9822d3aec919f5a838c6435fdd4ccd8f4
Remove remaining unused behaviors
Remove references to nonexistent :resize behavior

Behavior was removed in 1fd123d8355036389eccbc1e07e920b99202acc2
Merge pull request #1646 from cldwalker/update-behaviors

Update behaviors