[#1378] instance Interpret () - #1388

C:\projects\dhall-haskell\dhall\tests\Dhall\Test\Dhall.hs:170:36: error:
    • Overlapping instances for Interpret ()
        arising from the 'deriving' clause of a data type declaration
      Matching instances:
        instance Interpret () -- Defined in ‘Dhall’
        instance Interpret () -- Defined at tests\Dhall\Test\Dhall.hs:175:1
    • When deriving the instance for (Interpret Records)
    |
170 |     deriving (Eq, Generic, Inject, Interpret, Show)
    |                                    ^^^^^^^^^