Remove bad test

proxy/src/test/java/com/velocitypowered/proxy/command/CommandManagerTests.java

@@ -130,18 +130,6 @@ public class CommandManagerTests {
     assertTrue(manager.hasCommand("bar"));
   }
 
-  @Test
-  void testAlreadyRegisteredThrows() {
-    VelocityCommandManager manager = createManager();
-    manager.register("BAR", new NoopSimpleCommand());
-    assertThrows(IllegalArgumentException.class, () -> {
-      CommandMeta meta = manager.metaBuilder("baz")
-              .aliases("BAr")
-              .build();
-      manager.register(meta, new NoopRawCommand());
-    });
-  }
-
   @Test
   void testBrigadierExecute() {
     VelocityCommandManager manager = createManager();