Refactor, try to limit dependencies

src/Dodge/Data/TractorBeam.hs

@@ -1,19 +1,20 @@
-{-# LANGUAGE DeriveGeneric #-}
-{-# LANGUAGE TemplateHaskell #-}
 {-# LANGUAGE StrictData #-}
+{-# LANGUAGE TemplateHaskell #-}
+
 module Dodge.Data.TractorBeam where
-import GHC.Generics
-import Data.Aeson
-import Geometry.Data
+
 import Control.Lens
+import Data.Aeson
+import Data.Aeson.TH
+import Geometry.Data
+
 data TractorBeam = TractorBeam
     { _tbPos :: Point2
     , _tbStartPos :: Point2
     , _tbVel :: Point2
     , _tbTime :: Int
     }
-  deriving (Eq,Ord,Show,Read,Generic)
-instance ToJSON TractorBeam  where
-    toEncoding = genericToEncoding defaultOptions
-instance FromJSON TractorBeam 
+    deriving (Eq, Ord, Show, Read)
+
 makeLenses ''TractorBeam
+deriveJSON defaultOptions ''TractorBeam