transformers-compat-tests.cabal: Remove unused dependencies

Author: RyanGlScott

tests/transformers-compat-tests.cabal

@@ -43,14 +43,14 @@ test-suite spec
   main-is:              Spec.hs
   other-modules:        GenericsSpec
                         GenericsTypes
-  build-depends:        base             >= 4.3   && < 5
-                      , deriving-compat  >= 0.4   && < 1
-                      , generic-deriving >= 1.10  && < 2
-                      , hspec            >= 2     && < 3
-                      , QuickCheck       >= 2     && < 3
-                      , tagged           >= 0.7   && < 1
-                      , transformers     >= 0.2   && < 0.7
+  build-depends:        base             >= 4.3  && < 5
+                      , hspec            >= 2    && < 3
+                      , QuickCheck       >= 2    && < 3
                       , transformers-compat
+  if !impl(ghc >= 8.4)
+    build-depends:      generic-deriving >= 1.10 && < 2
+  if !impl(ghc >= 8.6)
+    build-depends:      deriving-compat  >= 0.4  && < 1
   build-tool-depends:   hspec-discover:hspec-discover >= 2 && < 3
   hs-source-dirs:       .
   ghc-options:          -Wall -threaded -rtsopts