Remove deprecated CoreDataFeedStore sync API in favor of the new async API

Author: caiozullo

EssentialFeed/EssentialFeed/Feed Cache/Infrastructure/CoreData/CoreDataFeedStore.swift

@@ -49,11 +49,6 @@ public final class CoreDataFeedStore: Sendable {
 		try await context.perform(action)
 	}
 
-	@available(*, deprecated, message: "Use async version instead")
-	public func perform(_ action: @Sendable @escaping () -> Void) {
-		context.perform(action)
-	}
-	
 	private func cleanUpReferencesToPersistentStores() {
 		context.performAndWait {
 			let coordinator = self.container.persistentStoreCoordinator