Drop unused SyncCrypto dependency from DuckChatSyncDataManager

The encryption hook was injected to wrap the chat title for outgoing
PATCHes, but the title was dropped from the wire payload when rename
sync was deferred to the JWE work. SyncCrypto wraps with the sync
master key — the wrong algorithm for ai_chats titles anyway — so the
follow-up rename work will bring its own primitives. Remove the
constructor param, the test mock, the unused stub, and the orphaned
imports.

Author: GerardPaligot

duckchat/duckchat-impl/src/main/java/com/duckduckgo/duckchat/impl/sync/DuckChatSyncDataManager.kt

@@ -27,7 +27,6 @@ import com.duckduckgo.duckchat.impl.feature.DuckChatFeature
 import com.duckduckgo.duckchat.impl.repository.DuckChatFeatureRepository
 import com.duckduckgo.duckchat.impl.sync.DuckChatSyncDataManager.Adapters.Companion.patchResponseAdapter
 import com.duckduckgo.duckchat.store.impl.DuckAiChatStore
-import com.duckduckgo.sync.api.SyncCrypto
 import com.duckduckgo.sync.api.engine.DeletableDataManager
 import com.duckduckgo.sync.api.engine.DeletableType
 import com.duckduckgo.sync.api.engine.ModifiedSince
@@ -65,7 +64,6 @@ class DuckChatSyncDataManager @Inject constructor(
     private val duckChatFeature: DuckChatFeature,
     @AppCoroutineScope private val appCoroutineScope: CoroutineScope,
     private val duckAiChatStore: DuckAiChatStore,
-    private val syncCrypto: SyncCrypto,
 ) : DeletableDataManager, SyncableDataProvider, SyncableDataPersister {
 
     override fun getDeletableType(): DeletableType = DeletableType.DUCK_AI_CHATS

duckchat/duckchat-impl/src/test/java/com/duckduckgo/duckchat/impl/sync/DuckChatSyncDataManagerTest.kt

@@ -25,7 +25,6 @@ import com.duckduckgo.duckchat.store.impl.DuckAiChat
 import com.duckduckgo.duckchat.store.impl.DuckAiChatStore
 import com.duckduckgo.feature.toggles.api.FakeFeatureToggleFactory
 import com.duckduckgo.feature.toggles.api.Toggle
-import com.duckduckgo.sync.api.SyncCrypto
 import com.duckduckgo.sync.api.engine.DeletableType
 import com.duckduckgo.sync.api.engine.FeatureSyncError
 import com.duckduckgo.sync.api.engine.SyncChangesResponse
@@ -61,8 +60,6 @@ class DuckChatSyncDataManagerTest {
 
     private val duckAiChatStore: DuckAiChatStore = mock()
 
-    private val syncCrypto: SyncCrypto = mock()
-
     private lateinit var testee: DuckChatSyncDataManager
 
     private val duckChatFeature = FakeFeatureToggleFactory.create(DuckChatFeature::class.java)
@@ -72,7 +69,6 @@ class DuckChatSyncDataManagerTest {
         whenever(duckChatFeatureRepository.isAIChatHistoryEnabled()).thenReturn(true)
         whenever(duckChatSyncRepository.getPendingChatDeletions()).thenReturn(emptySet())
         whenever(duckChatSyncRepository.getPendingChatUpdates()).thenReturn(emptySet())
-        whenever(syncCrypto.encrypt(any<String>())).thenAnswer { "ENC:${it.arguments[0]}" }
         testee = DuckChatSyncDataManager(
             duckChatSyncRepository = duckChatSyncRepository,
             duckChatFeatureRepository = duckChatFeatureRepository,
@@ -81,7 +77,6 @@ class DuckChatSyncDataManagerTest {
             duckChatFeature = duckChatFeature,
             appCoroutineScope = coroutineTestRule.testScope,
             duckAiChatStore = duckAiChatStore,
-            syncCrypto = syncCrypto,
         )
     }