remote: move default-extensions into common stanza

hnix-store-remote/hnix-store-remote.cabal

@@ -18,6 +18,25 @@ Common commons
     ghc-options:  -Wall -Wunused-packages
   else
     ghc-options:  -Wall
+  default-extensions:
+      OverloadedStrings
+    , DeriveGeneric
+    , DeriveDataTypeable
+    , DeriveFunctor
+    , DeriveFoldable
+    , DeriveTraversable
+    , DeriveLift
+    , FlexibleContexts
+    , FlexibleInstances
+    , StandaloneDeriving
+    , TypeApplications
+    , TypeSynonymInstances
+    , InstanceSigs
+    , MultiParamTypeClasses
+    , TupleSections
+    , LambdaCase
+    , BangPatterns
+    , ViewPatterns
 
 flag io-testsuite
   default:
@@ -64,25 +83,6 @@ library
       base hiding (Prelude)
     , relude (Relude as Prelude)
     , relude
-  default-extensions:
-      OverloadedStrings
-    , DeriveGeneric
-    , DeriveDataTypeable
-    , DeriveFunctor
-    , DeriveFoldable
-    , DeriveTraversable
-    , DeriveLift
-    , FlexibleContexts
-    , FlexibleInstances
-    , StandaloneDeriving
-    , TypeApplications
-    , TypeSynonymInstances
-    , InstanceSigs
-    , MultiParamTypeClasses
-    , TupleSections
-    , LambdaCase
-    , BangPatterns
-    , ViewPatterns
   hs-source-dirs:      src
   default-language:    Haskell2010
   ghc-options:         -Wall
@@ -139,23 +139,4 @@ test-suite hnix-store-remote-tests
       base hiding (Prelude)
     , relude (Relude as Prelude)
     , relude
-  default-extensions:
-      OverloadedStrings
-    , DeriveGeneric
-    , DeriveDataTypeable
-    , DeriveFunctor
-    , DeriveFoldable
-    , DeriveTraversable
-    , DeriveLift
-    , FlexibleContexts
-    , FlexibleInstances
-    , StandaloneDeriving
-    , TypeApplications
-    , TypeSynonymInstances
-    , InstanceSigs
-    , MultiParamTypeClasses
-    , TupleSections
-    , LambdaCase
-    , BangPatterns
-    , ViewPatterns
   default-language: Haskell2010