fix(apple): drop unused iOS background mode and empty Bonjour entry

UIBackgroundModes declared `remote-notification`, but the app has no APNs
code: notifications are local only, through UNUserNotificationCenter. The
background transfer assertion uses beginBackgroundTask, which needs no
declared mode. An unused background mode is gratuitous review surface.

NSBonjourServices held a single empty string, which is not a valid service
type. Nothing in the core browses or advertises Bonjour services — iroh's
local-discovery feature is not enabled — so the key served no purpose.
NSLocalNetworkUsageDescription stays: direct connections to peers on the
same network still need it.

apple/VniDrop/Resources/Info.plist

@@ -75,10 +75,6 @@
 	<true/>
 	<key>NFCReaderUsageDescription</key>
 	<string>VniDrop uses NFC to read transfer invitation tags.</string>
-	<key>NSBonjourServices</key>
-	<array>
-		<string></string>
-	</array>
 	<key>NSCameraUsageDescription</key>
 	<string>VniDrop uses the camera to scan transfer QR codes.</string>
 	<key>NSLocalNetworkUsageDescription</key>
@@ -87,10 +83,6 @@
 	     view. Mirrors the single-window macOS behavior. -->
 	<key>UIApplicationSupportsMultipleScenes</key>
 	<false/>
-	<key>UIBackgroundModes</key>
-	<array>
-		<string>remote-notification</string>
-	</array>
 	<key>UIFileSharingEnabled</key>
 	<true/>
 	<key>UILaunchScreen</key>