Added Remove Duplicates to the List Group in Utility block.

RuriLib/Blocks/BlockUtility.cs

@@ -71,6 +71,9 @@ namespace RuriLib
         /// <summary>Removes an element from a list variable.</summary>
         Remove,
 
+        /// <summary>Removes duplicate elements from a list variable, keeping only the first one.</summary>
+        RemoveDuplicates,
+
         /// <summary>Picks a random element from a list variable.</summary>
         Random
     }
@@ -489,6 +492,10 @@ namespace RuriLib
                                 variable.Value.RemoveAt(index);
                                 break;
 
+                            case ListAction.RemoveDuplicates:
+                                data.Variables.Set(new CVar(variableName, list.Distinct().ToList(), isCapture));
+                                break;
+
                             case ListAction.Random:
                                 data.Variables.Set(new CVar(variableName, list[data.rand.Next(list.Count)], isCapture));
                                 break;