Revert "ios: Add boilerplate about APIs we don't, in fact, use."

This reverts commit c8d0c8d.

As planned [1] [2], now that we've upgraded react-native-unimodules.

[1] https://chat.zulip.org/#narrow/stream/243-mobile-team/topic/apple.20purpose.20strings/near/869928
[2] #4091 (comment)

ios/ZulipMobile/Info.plist

@@ -50,28 +50,14 @@
 			</dict>
 		</dict>
 	</dict>
-	<key>NSCalendarsUsageDescription</key>
-	<string>Allow $(PRODUCT_NAME) to access your calendar</string>
 	<key>NSCameraUsageDescription</key>
 	<string>Take a photo and upload it to a Zulip realm</string>
-	<key>NSContactsUsageDescription</key>
-	<string>Allow $(PRODUCT_NAME) to access your contacts</string>
-	<key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
-	<string>Allow $(PRODUCT_NAME) to use your location</string>
-	<key>NSLocationAlwaysUsageDescription</key>
-	<string>Allow $(PRODUCT_NAME) to use your location</string>
 	<key>NSLocationWhenInUseUsageDescription</key>
-	<string>Allow $(PRODUCT_NAME) to use your location</string>
-	<key>NSMicrophoneUsageDescription</key>
-	<string>Allow $(PRODUCT_NAME) to access your microphone</string>
-	<key>NSMotionUsageDescription</key>
-	<string>Allow $(PRODUCT_NAME) to access your device's accelerometer</string>
+	<string></string>
 	<key>NSPhotoLibraryAddUsageDescription</key>
 	<string>Download photos from Zulip realm</string>
 	<key>NSPhotoLibraryUsageDescription</key>
 	<string>Upload photos to a Zulip realm</string>
-	<key>NSRemindersUsageDescription</key>
-	<string>Allow $(PRODUCT_NAME) to access your reminders</string>
 	<key>UIAppFonts</key>
 	<array>
 		<string>Entypo.ttf</string>