fix: discard update handler for self-update

Author: louisunlimited

Sources/Swiftly/SelfUpdate.swift

@@ -21,10 +21,7 @@ struct SelfUpdate: SwiftlyCommand {
     }
 
     mutating func run(_ ctx: SwiftlyCoreContext) async throws {
-        let versionUpdateReminder = try await validateSwiftly(ctx)
-        defer {
-            versionUpdateReminder()
-        }
+        let _ = try await validateSwiftly(ctx)
 
         let swiftlyBin = Swiftly.currentPlatform.swiftlyBinDir(ctx).appendingPathComponent("swiftly")
         guard FileManager.default.fileExists(atPath: swiftlyBin.path) else {