Remove VPN configurations after app reset on iOS (#661)

client/platforms/ios/LogController.swift

@@ -1,4 +1,5 @@
 import Foundation
+import NetworkExtension
 
 public func swiftUpdateLogData(_ qtString: std.string) -> std.string {
   let qtLog = Log(String(describing: qtString))
@@ -24,3 +25,26 @@ public func swiftDeleteLog() {
 public func toggleLogging(_ isEnabled: Bool) {
   Log.isLoggingEnabled = isEnabled
 }
+
+public func clearSettings() {
+  NETunnelProviderManager.loadAllFromPreferences { managers, error in
+    if let error {
+      NSLog("clearSettings removeFromPreferences error: \(error.localizedDescription)")
+      return
+    }
+
+    managers?.forEach { manager in
+      manager.removeFromPreferences { error in
+        if let error {
+          NSLog("NE removeFromPreferences error: \(error.localizedDescription)")
+        } else {
+          manager.loadFromPreferences { error in
+            if let error {
+              NSLog("NE loadFromPreferences after remove error: \(error.localizedDescription)")
+            }
+          }
+        }
+      }
+    }
+  }
+}