Remove unused Combine import (#287)

* Remove Unused Combine

Remove unused combine dependency

* Replace CryptoKit to swift-crypto

* Update commnet

Co-authored-by: Mattt <mattt@me.com>

* Revert commit to separate PR Replace CryptoKit

* Update comment to pass Lint

* Update comments for details

Co-authored-by: Mattt <mattt@me.com>

---------

Co-authored-by: Mattt <mattt@me.com>

Author: Skyline-23

Sources/Hub/Downloader.swift

@@ -6,15 +6,14 @@
 //  See LICENSE at https://github.com/huggingface/swift-coreml-diffusers/LICENSE
 //
 
-import Combine
 import Foundation
 
 /// A robust file downloader with support for resumable downloads and progress reporting.
 ///
 /// The Downloader class handles file downloads from remote URLs with features including
 /// automatic resume capability, progress tracking, speed monitoring, and retry mechanisms.
 /// It supports both foreground and background download sessions for different use cases.
-final class Downloader: NSObject, Sendable, ObservableObject {
+final class Downloader: NSObject, Sendable {
     private let destination: URL
     private let incompleteDestination: URL
     private let downloadResumeState: DownloadResumeState = .init()

Sources/Hub/HubApi.swift

@@ -491,9 +491,10 @@ public extension HubApi {
             }
         }
 
-        /// Note we go from Combine in Downloader to callback-based progress reporting
-        /// We'll probably need to support Combine as well to play well with Swift UI
-        /// (See for example PipelineLoader in swift-coreml-diffusers)
+        /// Downloads the file with progress tracking.
+        /// - Parameter progressHandler: Called with download progress (0.0-1.0) and speed in bytes/sec, if available.
+        /// - Returns: Local file URL (uses cached file if commit hash matches).
+        /// - Throws: ``EnvironmentError`` errors for file and metadata validation failures, ``Downloader.DownloadError`` errors during transfer, or ``CancellationError`` if the task is cancelled.
         @discardableResult
         func download(progressHandler: @escaping (Double, Double?) -> Void) async throws -> URL {
             let localMetadata = try hub.readDownloadMetadata(metadataPath: metadataDestination)

Tests/HubTests/DownloaderTests.swift

@@ -5,7 +5,6 @@
 //  Created by Arda Atahan Ibis on 1/28/25.
 //
 
-import Combine
 import XCTest
 
 @testable import Hub