Auto merge of rust-lang#146491 - jdonszelmann:update-fixme-compare_method_predicate_entailment, r=lcnr

update fixme in compare_method_predicate_entailment resulting from review of EII

r? `@lcnr`

Just the comment update separately from https://github.com/rust-lang/rust/pull/146348/files since it doesn't really belong in that PR. Should be trivial

Author: bors