Drop unused Data.ByteString.Lazy / Data.List / Data.IntMap imports

Upstream cleanup, not Leios-specific: eight unused-import warnings that
upstream's own ghc-options promote to errors via 'nix/ouroboros-network.nix'
('-Werror' on forAllProjectPackages). They've been present at the
'main-peras-5202-merged' SHA that cardano-node and ouroboros-consensus
master both consume; surface when downstream haskell.nix builds also
inherit `-Werror`.

Affected files (one unused qualified import each):
- framework/lib/Ouroboros/Network/Protocol/Handshake/Codec.hs (BL)
- framework/tests-lib/.../ConnectionManager/Experiments.hs (LBS)
- framework/io-tests/.../Driver.hs (List)
- framework/io-tests/.../Socket.hs (IntMap)
- tests/lib/.../TxSubmission/AppV1.hs (BSL)
- tests/lib/.../TxSubmission/AppV2.hs (BSL)
- protocols/tests-lib/.../KeepAlive/Test.hs (BL)
- protocols/tests-lib/.../PeerSharing/Test.hs (BL)

Verified with 'cabal clean && cabal build all --ghc-options=-Werror' →
exit 0.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: ch1bo

ouroboros-network/framework/io-tests/Test/Ouroboros/Network/Driver.hs

@@ -14,7 +14,6 @@ module Test.Ouroboros.Network.Driver (tests) where
 import Data.Bifunctor (bimap)
 import Data.Kind (Type)
 import Data.List (intercalate)
-import Data.List qualified as List
 import Text.Read (readMaybe)
 
 import Network.TypedProtocol.Codec

ouroboros-network/framework/io-tests/Test/Ouroboros/Network/Socket.hs

@@ -13,7 +13,6 @@ module Test.Ouroboros.Network.Socket (tests) where
 import Data.Bifoldable (bitraverse_)
 import Data.ByteString.Lazy qualified as BL
 import Data.Either (fromRight)
-import Data.IntMap qualified as IntMap
 import Data.List (mapAccumL)
 import Data.Monoid.Synchronisation (FirstToFinish (..))
 import Data.Time.Clock (UTCTime, getCurrentTime)

ouroboros-network/framework/lib/Ouroboros/Network/Protocol/Handshake/Codec.hs

@@ -22,7 +22,6 @@ import Control.Monad (replicateM, unless)
 import Control.Monad.Class.MonadST
 import Control.Monad.Class.MonadTime.SI
 import Data.ByteString.Lazy (ByteString)
-import Data.ByteString.Lazy qualified as BL
 import Data.Either (partitionEithers)
 import Data.Map (Map)
 import Data.Map qualified as Map

ouroboros-network/framework/tests-lib/Test/Ouroboros/Network/ConnectionManager/Experiments.hs

@@ -52,7 +52,6 @@ import Control.Tracer (Tracer (..), contramap, nullTracer)
 
 import Codec.Serialise.Class (Serialise)
 import Data.ByteString.Lazy (ByteString)
-import Data.ByteString.Lazy qualified as LBS
 import Data.Functor (($>), (<&>))
 import Data.Functor.Compose
 import Data.Hashable

ouroboros-network/protocols/tests-lib/Ouroboros/Network/Protocol/KeepAlive/Test.hs

@@ -18,7 +18,6 @@ import Control.Tracer (nullTracer)
 
 import Codec.CBOR.Read qualified as CBOR
 import Data.ByteString.Lazy (ByteString)
-import Data.ByteString.Lazy qualified as BL
 
 import Network.TypedProtocol.Codec
 import Network.TypedProtocol.Codec.Properties

ouroboros-network/protocols/tests-lib/Ouroboros/Network/Protocol/PeerSharing/Test.hs

@@ -19,7 +19,6 @@ import Control.Monad.Class.MonadTime.SI
 import Control.Monad.IOSim (runSimOrThrow)
 import Control.Monad.ST (runST)
 import Control.Tracer (nullTracer)
-import Data.ByteString.Lazy qualified as BL
 import Data.Foldable as Foldable (foldl')
 import Data.Word (Word8)
 

ouroboros-network/tests/lib/Test/Ouroboros/Network/TxSubmission/AppV1.hs

@@ -26,7 +26,6 @@ import Control.Monad.Class.MonadTimer.SI
 import Control.Monad.IOSim hiding (SimResult)
 import Control.Tracer (Tracer (..), contramap, nullTracer)
 
-import Data.ByteString.Lazy qualified as BSL
 import Data.Function (on)
 import Data.List (intercalate, nubBy)
 import Data.Maybe (fromMaybe)

ouroboros-network/tests/lib/Test/Ouroboros/Network/TxSubmission/AppV2.hs

@@ -32,7 +32,6 @@ import Control.Monad.Class.MonadTimer.SI
 import Control.Monad.IOSim
 import Control.Tracer (Tracer (..), contramap)
 
-import Data.ByteString.Lazy qualified as BSL
 import Data.Foldable (traverse_)
 import Data.Function (on)
 import Data.Hashable