[simple-json] remove Argonaut imports which were unused

Argonaut is still there because of generic functions that I don't want
to remove yet. It's also in Spec.

src/Gargantext/Components/DocsTable/Types.purs

@@ -33,16 +33,6 @@ derive instance Generic DocumentsView _
 instance Eq DocumentsView where
   eq = genericEq
 
-{-
-derive instance Generic DocumentsView _
-instance Show DocumentsView where
-  show = genericShow
-instance Argonaut.DecodeJson SearchType where
-  decodeJson = genericSumDecodeJson
-instance Argonaut.EncodeJson SearchType where
-  encodeJson = genericSumEncodeJson
-  -}
-
 instance JSON.ReadForeign DocumentsView where
   readImpl f = do
     { id, category, date, ngramCount, score, source, title, url } :: { id :: Int | DocumentsViewT } <- JSON.readImpl f

src/Gargantext/Components/Forest/Tree/Node/Action/Contact/Types.purs

@@ -6,7 +6,6 @@ import Data.Show.Generic (genericShow)
 import Simple.JSON as JSON
 
 import Gargantext.Prelude (class Eq, class Show)
-import Gargantext.Utils.Argonaut (genericSumDecodeJson, genericSumEncodeJson)
 
 newtype AddContactParams =
   AddContactParams { firstname :: String, lastname :: String }

src/Gargantext/Components/Forest/Tree/Node/Action/Link.purs

@@ -18,7 +18,6 @@ import Gargantext.Prelude
 import Gargantext.Routes (SessionRoute(..))
 import Gargantext.Sessions (Session, post)
 import Gargantext.Types  as GT
-import Gargantext.Utils.Argonaut (genericSumDecodeJson, genericSumEncodeJson)
 import Gargantext.Utils.Reactix as R2
 
 here :: R2.Here

src/Gargantext/Components/Forest/Tree/Node/Action/Share.purs

@@ -21,7 +21,6 @@ import Gargantext.Routes as GR
 import Gargantext.Sessions (Session, post)
 import Gargantext.Types (ID)
 import Gargantext.Types as GT
-import Gargantext.Utils.Argonaut (genericSumDecodeJson, genericSumEncodeJson)
 import Gargantext.Utils.Reactix as R2
 
 here :: R2.Here

src/Gargantext/Components/Forest/Tree/Node/Action/Update/Types.purs

@@ -8,8 +8,6 @@ import Simple.JSON.Generics as JSONG
 
 import Gargantext.Prelude
 
-import Gargantext.Utils.Argonaut (genericSumDecodeJson, genericSumEncodeJson, genericEnumDecodeJson, genericEnumEncodeJson)
-
 
 data UpdateNodeParams = UpdateNodeParamsList  { methodList  :: Method      }
                       | UpdateNodeParamsGraph { methodGraph :: GraphMetric }

src/Gargantext/Components/Nodes/Frame.purs

@@ -21,7 +21,6 @@ import Gargantext.Hooks.Loader (useLoader)
 import Gargantext.Routes (SessionRoute(NodeAPI))
 import Gargantext.Sessions (Session, get, sessionId)
 import Gargantext.Types (NodeType(..))
-import Gargantext.Utils.Argonaut (genericSumEncodeJson)
 import Gargantext.Utils.Reactix as R2
 import Gargantext.Utils.Toestand as T2
 

src/Gargantext/Components/Nodes/Home/Public.purs

@@ -16,7 +16,6 @@ import Gargantext.Config.REST (get)
 import Gargantext.Ends (backendUrl)
 import Gargantext.Hooks.Loader (useLoader)
 import Gargantext.Prelude
-import Gargantext.Utils.Argonaut (genericSumDecodeJson, genericSumEncodeJson)
 import Gargantext.Utils.Reactix as R2
 
 here :: R2.Here

src/Gargantext/Utils/DecodeMaybe.js

-'use strict';
-
-exports.isNull = function(v) {
-    return v === null;
-};

src/Gargantext/Utils/DecodeMaybe.purs

-module Gargantext.Utils.DecodeMaybe where
-
-import Prelude
-
-import Data.Argonaut (class DecodeJson, Json, getFieldOptional)
-import Data.Argonaut.Decode.Error (JsonDecodeError(..))
-import Data.Either (Either)
-import Data.Maybe (Maybe(..), fromMaybe)
-import Foreign.Object (Object)
-
-foreign import isNull :: forall a. a -> Boolean
-
-getFieldOptional' :: forall a. DecodeJson a => 
-  Object Json -> String -> Either JsonDecodeError (Maybe a)
-getFieldOptional' o s = (case _ of
-    Just v -> if isNull v then Nothing else v
-    Nothing -> Nothing
-  ) <$> (getFieldOptional o s)
-
-infix 7 getFieldOptional' as .?|
-
-getFieldOptionalAsMempty :: forall a. DecodeJson a => 
-  Monoid a => Object Json -> String -> Either JsonDecodeError a
-getFieldOptionalAsMempty o s = 
-  fromMaybe mempty <$> (getFieldOptional' o s)
-
-infix 7 getFieldOptionalAsMempty as .|