remove helper functions dealing with maps

[Noxsios]

Describe what should be investigated or refactored

Now that https://pkg.go.dev/maps exists, there is no need for certain functions in helpers to exist. They should be deprecated and return the upstream maps versions of their operations.

Links to any relevant code

pkg/helpers/misc.go

Line 40 in fa0230e

func MergeMap[T any](m1, m2 map[string]T) (r map[string]T) {