Remove old Package.swift file

Author: kean

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version:5.7
+// swift-tools-version:5.9
 import PackageDescription
 
 let package = Package(
@@ -7,7 +7,8 @@ let package = Package(
         .iOS(.v13),
         .tvOS(.v13),
         .macOS(.v10_15),
-        .watchOS(.v6)
+        .watchOS(.v6),
+        .visionOS(.v1),
     ],
     products: [
         .library(name: "Nuke", targets: ["Nuke"]),