chore: remove deprecated toMap missed in leanprover-community#35335 (leanprover-community#35388)

I mistakenly added this back in leanprover-community@894135c whereas I should have just deleted the `attribute` commands as well.

Author: bryangingechen

Mathlib/GroupTheory/MonoidLocalization/Basic.lean

@@ -415,10 +415,6 @@ abbrev toMonoidHom (f : LocalizationMap S N) : M →* N where
   __ := f
   map_one' := f.isLocalizationMap.map_one (f := f.toMulHom)
 
-/-- Short for `toMonoidHom`; used to apply a localization map as a function. -/
-@[to_additive /-- Short for `toAddMonoidHom`; used to apply a localization map as a function. -/]
-abbrev toMap (f : LocalizationMap S N) := f.toMonoidHom
-
 @[to_additive]
 theorem toMonoidHom_injective : Injective (toMonoidHom : LocalizationMap S N → M →* N) :=
   fun f g ↦ by cases f; congr! with eq; ext; exact congr($eq _)