Remove duplicate type variables

src/main/java/de/dhbwstuttgart/target/generate/ASTToTargetAST.java

@@ -411,6 +411,15 @@ public class ASTToTargetAST {
                     }
                 }
             } while (foundInfima);
+
+            // Remove duplicate bounds
+            for (var pair : new HashSet<>(input)) {
+                if (pair instanceof PairTPHequalRefTypeOrWildcardType) {
+                    if (input.stream().anyMatch(p -> p instanceof PairTPHsmallerTPH && p.getLeft().equals(pair.getLeft()))) {
+                        input.remove(pair);
+                    }
+                }
+            }
         }
 
         TargetType get(TypePlaceholder tph) {