[CSL-124] Fix tests
[CSL-124] Fix tests

We already have test for 'Coin' serialization in Test.Pos.Types.Identity.BinarySpec.

input-output-hk/cardano-sl,input-output-hk/cardano-sl,input-output-hk/cardano-sl,input-output-hk/pos-haskell-prototype,input-output-hk/cardano-sl,input-output-hk/pos-haskell-prototype,input-output-hk/pos-haskell-prototype