Remove facebook username. Fixes #59.

Author: calebd

Providers/Facebook/SimpleAuthFacebookProvider.m

@@ -123,7 +123,6 @@ - (NSDictionary *)dictionaryWithRemoteAccount:(NSDictionary *)remoteAccount syst
 
     // User info
     NSMutableDictionary *user = [NSMutableDictionary new];
-    user[@"nickname"] = remoteAccount[@"username"];
     if (remoteAccount[@"email"]) {
         user[@"email"] = remoteAccount[@"email"];
     }

Providers/FacebookWeb/SimpleAuthFaceBookWebProvider.m

@@ -161,7 +161,6 @@ - (NSDictionary *)dictionaryWithAccount:(NSDictionary *)account accessToken:(NSD
 
     // User info
     NSMutableDictionary *user = [NSMutableDictionary new];
-    user[@"nickname"] = account[@"username"];
     if (account[@"email"]) {
         user[@"email"] = account[@"email"];
     }