Don't report unused packages in tests

For not, '-Wno-redundant-constraints' is needed in testing libraries
to prevent false-positives that lead to build errors with `-Werror`.
See https://gitlab.haskell.org/ghc/ghc/-/issues/24173 for details.

Author: geo2a

cardano-diffusion/cardano-diffusion.cabal

@@ -47,9 +47,16 @@ common ghc-options
 -- in tests librararies redundant constraints are sometimes useful (e.g.
 -- by default truned off debug tracing might require extra constraints like
 -- `Show` or `MonadSay`).
+--
+-- TODO: '-Wno-redundant-constraints' remove when we support
+-- `quickcheck-monoids`. For now, it is needed to prevent
+-- false-positives that lead to build errors with `-Werror`.
+-- See https://gitlab.haskell.org/ghc/ghc/-/issues/24173 for details.
 common ghc-options-tests
   import: ghc-options
-  ghc-options: -Wno-redundant-constraints
+  ghc-options:
+    -Wno-redundant-constraints
+    -Wno-unused-packages
 
 library api
   import: ghc-options

ouroboros-network/ouroboros-network.cabal

@@ -55,9 +55,16 @@ common ghc-options
 -- in tests librararies redundant constraints are sometimes useful (e.g.
 -- by default truned off debug tracing might require extra constraints like
 -- `Show` or `MonadSay`).
+--
+-- TODO: '-Wno-redundant-constraints' remove when we support
+-- `quickcheck-monoids`. For now, it is needed to prevent
+-- false-positives that lead to build errors with `-Werror`.
+-- See https://gitlab.haskell.org/ghc/ghc/-/issues/24173 for details.
 common ghc-options-tests
   import: ghc-options
-  ghc-options: -Wno-redundant-constraints
+  ghc-options:
+    -Wno-redundant-constraints
+    -Wno-unused-packages
 
 library api
   import: ghc-options
@@ -451,7 +458,7 @@ library tests-lib
     cpp-options: -DNIGHTLY
 
 test-suite tests-lib-tests
-  import: ghc-options
+  import: ghc-options-tests
   type: exitcode-stdio-1.0
   main-is: Main.hs
   hs-source-dirs: tests-lib/tests
@@ -468,7 +475,7 @@ test-suite tests-lib-tests
     -threaded
 
 library framework-tests-lib
-  import: ghc-options
+  import: ghc-options-tests
   mixins:
     QuickCheck hiding (Test.QuickCheck.Monoids)
 
@@ -500,7 +507,7 @@ library framework-tests-lib
     typed-protocols:{typed-protocols, examples},
 
 test-suite framework-sim-tests
-  import: ghc-options
+  import: ghc-options-tests
   mixins:
     QuickCheck hiding (Test.QuickCheck.Monoids)
 
@@ -547,7 +554,7 @@ test-suite framework-sim-tests
     cpp-options: -DOUROBOROS_NETWORK_IPV6
 
 test-suite framework-io-tests
-  import: ghc-options
+  import: ghc-options-tests
   type: exitcode-stdio-1.0
   main-is: Main.hs
   hs-source-dirs: framework/io-tests
@@ -583,7 +590,7 @@ test-suite framework-io-tests
     -threaded
 
 library orphan-instances
-  import: ghc-options
+  import: ghc-options-tests
   visibility: public
   hs-source-dirs: orphan-instances
   exposed-modules:
@@ -742,7 +749,7 @@ library protocols
     typed-protocols:{typed-protocols, cborg, stateful, stateful-cborg} ^>=1.1,
 
 library protocols-tests-lib
-  import: ghc-options
+  import: ghc-options-tests
   visibility: public
   hs-source-dirs: protocols/tests-lib
   exposed-modules: