Reverted frame count hack originating from the WW1 code

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/Upscaling.cs

@@ -215,19 +215,13 @@ namespace UnityEngine.Rendering.PostProcessing
 			}
 		}
 		
-		private int _frameIndex;
-		
 		private void ApplyJitter(Camera camera)
 		{
 			var scaledRenderSize = GetScaledRenderSize(camera);
 			
-			// Stop frame debugger from freaking out
-			if (Time.deltaTime > 0) 
-				_frameIndex++;
-            
 			// Perform custom jittering of the camera's projection matrix according to FSR's recipe
 			int jitterPhaseCount = Fsr2.GetJitterPhaseCount(scaledRenderSize.x, _upscaleSize.x);
-			Fsr2.GetJitterOffset(out float jitterX, out float jitterY, _frameIndex, jitterPhaseCount);
+			Fsr2.GetJitterOffset(out float jitterX, out float jitterY, Time.frameCount, jitterPhaseCount);
             
 			JitterOffset = new Vector2(jitterX, jitterY);