Fix NPE resulting from using /mcremove command on a Flatfile DB. Fixes

#509.

src/main/java/com/gmail/nossr50/commands/mc/McremoveCommand.java

@@ -73,7 +73,7 @@ public class McremoveCommand implements CommandExecutor {
             }
         }
 
-        database.profileCleanup(playerName);
+        Database.profileCleanup(playerName);
 
         return true;
     }

src/main/java/com/gmail/nossr50/util/Database.java

@@ -465,7 +465,7 @@ public class Database {
         System.out.println("VendorError: " + ex.getErrorCode());
     }
 
-    public void profileCleanup(String playerName) {
+    public static void profileCleanup(String playerName) {
         McMMOPlayer mcmmoPlayer = Users.getPlayer(playerName);
 
         if (mcmmoPlayer != null) {