Remove `map_Forall_insert_1_1` and `map_Forall_insert_1_2`
See discussion in !564 (comment 104221)
- The names are not great
- By using the
↔lemma (i.e.,map_Forall_insertone often gets simpler proofs, see iris@69446a0b for an example - At least Perennial still uses
map_Forall_insert_1_1andmap_Forall_insert_1_2so we should see if it's worth breaking backwards compatibility.