Remove test guarantee of audio time not advancing

osu.Game.Tests/Visual/Gameplay/TestScenePause.cs

@@ -122,7 +122,7 @@ public void TestPauseResume()
 
             resumeAndConfirm();
 
-            AddAssert("Resumed without seeking forward", () => Player.LastResumeTime, () => Is.LessThanOrEqualTo(Player.LastPauseTime));
+            AddAssert("continued playing forward", () => Player.LastResumeTime, () => Is.GreaterThanOrEqualTo(Player.LastPauseTime));
 
             AddUntilStep("player playing", () => Player.LocalUserPlaying.Value);
         }

osu.Game/Screens/Play/GameplayClockContainer.cs

@@ -78,8 +78,6 @@ public void Start()
 
             isPaused.Value = false;
 
-            PrepareStart();
-
             // The case which caused this to be added is FrameStabilityContainer, which manages its own current and elapsed time.
             // Because we generally update our own current time quicker than children can query it (via Start/Seek/Update),
             // this means that the first frame ever exposed to children may have a non-zero current time.
@@ -99,14 +97,6 @@ public void Start()
             });
         }
 
-        /// <summary>
-        /// When <see cref="Start"/> is called, this will be run to give an opportunity to prepare the clock at the correct
-        /// start location.
-        /// </summary>
-        protected virtual void PrepareStart()
-        {
-        }
-
         /// <summary>
         /// Seek to a specific time in gameplay.
         /// </summary>