Remove preview rate limitation button

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Drawing/PreviewManager.cs

-using System;
+using System;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO;
         MaterialPropertyBlock m_PreviewPropertyBlock;
         PreviewSceneResources m_SceneResources;
         Texture2D m_ErrorTexture;
-        DateTime m_LastUpdate;
-
-        public PreviewRate previewRate { get; set; }
 
         public PreviewRenderData masterRenderData
         {
 
         public void RenderPreviews()
         {
-            if (previewRate == PreviewRate.Off)
-                return;
-
-            var updateTime = DateTime.Now;
-            if (previewRate == PreviewRate.Throttled && (updateTime - m_LastUpdate) < TimeSpan.FromSeconds(1.0 / 10.0))
-                return;
-
-            m_LastUpdate = updateTime;
-
             if (m_DirtyShaders.Any())
             {
                 m_NodesWith3DPreview.Clear();

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Drawing/Views/GraphEditorView.cs

         MaterialGraphView m_GraphView;
         GraphInspectorView m_GraphInspectorView;
         ToolbarView m_ToolbarView;
-        ToolbarButtonView m_TimeButton;
 
         AbstractMaterialGraph m_Graph;
         PreviewManager m_PreviewManager;
             get { return m_GraphView; }
         }
 
-        public PreviewRate previewRate
-        {
-            get { return previewManager.previewRate; }
-            set { previewManager.previewRate = value; }
-        }
-
-        public PreviewManager previewManager
+        PreviewManager previewManager
-        public GraphInspectorView inspectorView
+        GraphInspectorView inspectorView
         {
             get { return m_GraphInspectorView; }
         }
                 m_ToolbarView.Add(showInProjectButton);
 
                 m_ToolbarView.Add(new ToolbarSeparatorView());
-                m_ToolbarView.Add(new ToolbarSpaceView());
-                m_ToolbarView.Add(new ToolbarSeparatorView());
-
-                m_TimeButton = new ToolbarButtonView { text = "Preview rate: " + previewRate };
-                m_TimeButton.AddManipulator(new Clickable(() =>
-                    {
-                        if (previewRate == PreviewRate.Full)
-                            previewRate = PreviewRate.Throttled;
-                        else if (previewRate == PreviewRate.Throttled)
-                            previewRate = PreviewRate.Off;
-                        else if (previewRate == PreviewRate.Off)
-                            previewRate = PreviewRate.Full;
-                        m_TimeButton.text = "Preview rate: " + previewRate;
-                    }));
-                m_ToolbarView.Add(m_TimeButton);
             }
             Add(m_ToolbarView);