Clean CoreEditorUtils unused method

com.unity.render-pipelines.core/CoreRP/Editor/CoreEditorUtils.cs

             new GUIContent("Y"),
             new GUIContent("Z"),
         };
-        static readonly GUIContent[] k_DrawVector6Slider_LabelPositives =
-        {
-            new GUIContent("+X"),
-            new GUIContent("+Y"),
-            new GUIContent("+Z"),
-        };
-        static readonly GUIContent[] k_DrawVector6Slider_LabelNegatives =
-        {
-            new GUIContent("-X"),
-            new GUIContent("-Y"),
-            new GUIContent("-Z"),
-        };
-        public static void DrawVector6Slider(GUIContent label, SerializedProperty positive, SerializedProperty negative, Vector3 min, Vector3 max)
-        {
-            GUILayout.BeginVertical();
-            EditorGUILayout.LabelField(label);
-            ++EditorGUI.indentLevel;
-
-            var rect = GUILayoutUtility.GetRect(0, float.MaxValue, EditorGUIUtility.singleLineHeight, EditorGUIUtility.singleLineHeight);
-            var v = positive.vector3Value;
-            EditorGUI.BeginChangeCheck();
-            v = DrawVector3Slider(rect, k_DrawVector6Slider_LabelPositives, v, min, max);
-            if (EditorGUI.EndChangeCheck())
-                positive.vector3Value = v;
-
-            GUILayout.Space(EditorGUIUtility.standardVerticalSpacing);
-
-            rect = GUILayoutUtility.GetRect(0, float.MaxValue, EditorGUIUtility.singleLineHeight, EditorGUIUtility.singleLineHeight);
-            v = negative.vector3Value;
-            EditorGUI.BeginChangeCheck();
-            v = DrawVector3Slider(rect, k_DrawVector6Slider_LabelNegatives, v, min, max);
-            if (EditorGUI.EndChangeCheck())
-                negative.vector3Value = v;
-            --EditorGUI.indentLevel;
-            GUILayout.EndVertical();
-        }
 
         public static void DrawVector6(GUIContent label, SerializedProperty positive, SerializedProperty negative, Vector3 min, Vector3 max, Color[][] colors = null)
         {
                 negative.vector3Value = v;
             --EditorGUI.indentLevel;
             GUILayout.EndVertical();
-        }
-
-        static Vector3 DrawVector3Slider(Rect rect, GUIContent[] labels, Vector3 value, Vector3 min, Vector3 max)
-        {
-            // Use a corrected width due to the hacks used for layouting the slider properly below
-            rect.width -= 20;
-            var fieldWidth = rect.width / 3f;
-
-            for (var i = 0; i < 3; ++i)
-            {
-                var c = new Rect(rect.x + fieldWidth * i, rect.y, fieldWidth, rect.height);
-                var labelRect = new Rect(c.x, c.y, k_DrawVector6Slider_LabelSize, c.height);
-                var sliderRect = new Rect(labelRect.x + labelRect.width, c.y, c.width - k_DrawVector6Slider_LabelSize - k_DrawVector6Slider_FieldSize + 45, c.height);
-                var fieldRect = new Rect(sliderRect.x + sliderRect.width - 25, c.y, k_DrawVector6Slider_FieldSize, c.height);
-                EditorGUI.LabelField(labelRect, labels[i]);
-                value[i] = GUI.HorizontalSlider(sliderRect, value[i], min[i], max[i]);
-                value[i] = EditorGUI.FloatField(fieldRect, value[i]);
-            }
-            return value;
         }
 
         static Vector3 DrawVector3(Rect rect, GUIContent[] labels, Vector3 value, Vector3 min, Vector3 max, bool addMinusPrefix, Color[] colors)