Purge the code base of the RequireNetworkMagic type

[erikd]

This type is defined in cardano-config/src/Cardano/Config/Types.hs as:

data RequireNetworkMagic
    = RequireNetworkMagic
    | NoRequireNetworkMagic
    deriving (Eq, Show)

but is close to identical to this from cardano-ledger:

data RequiresNetworkMagic
  = RequiresNoMagic
  | RequiresMagic
  deriving (Show, Eq, Generic, NFData, NoUnexpectedThunks)

Its a huge pain in the neck have two type that are completely isomorphic.

RequireNetworkMagic has to die and be replaced by the one from ledger

[erikd]

Probably also worth checking if there are any other types like this that mirror types lower in the dependency stack and kill them at the same time.

[erikd]

Not a priority for this weeks' snapshot but should do it early next week.

[Jimbo4350]

Removed in #326