【ut】add UT

Author: songyumeng

src/openlayers/core/StyleUtils.js

@@ -988,15 +988,6 @@ export class StyleUtils {
     }
   }
 
-  /**
-   * @function StyleUtils.stopCanvg
-   * @description 调用Canvg实例的stop();
-   */
-  static stopCanvg() {
-    this.canvgsV.forEach(v => v.stop());
-    this.canvgsV = [];
-  }
-
   /**
    * @function StyleUtils.getMarkerDefaultStyle 获取默认标注图层feature的样式
    * @param {string} featureType feature的类型

src/openlayers/overlay/vectortile/olExtends.js

@@ -24,14 +24,6 @@
                  units: ol.proj.Units.TILE_PIXELS
              });
          };
-         //解决 new ol.format.MVT({featureClass: ol.Feature})时，非3857显示异常的问题。ol即将发布的5.0版本已解决。
-         // eslint-disable-next-line no-unused-vars
-         ol.format.MVT.prototype.readProjection = function(source) {
-             return new ol.proj.Projection({
-                 code: '',
-                 units: ol.proj.Units.TILE_PIXELS
-             });
-         };
          //解决面填充时不能整版填充的问题。ol即将发布的5.0版本已解决。
          // eslint-disable-next-line no-unused-vars
          ol.render.canvas.Replay.prototype.applyFill = function(state, geometry) {