Remove unused _scaleStacked cache (#7494)

diff --git a/src/core/core.datasetController.js b/src/core/core.datasetController.js
index 1f16ec89be1c614b68f5959683c6903c5b07445f..a968ff14345fb686cff1977a2371cb3331a489f3 100644 (file)
--- a/src/core/core.datasetController.js
+++ b/src/core/core.datasetController.js
@@ -234,7 +234,6 @@ export default class DatasetController {
                this._parsing = false;
                this._data = undefined;
                this._objectData = undefined;
-               this._scaleStacked = {};
 
                this.initialize();
        }
@@ -661,21 +660,6 @@ export default class DatasetController {
                return values;
        }
 
-       /**
-        * @private
-        */
-       _cacheScaleStackStatus() {
-               const me = this;
-               const meta = me._cachedMeta;
-               const iScale = meta.iScale;
-               const vScale = meta.vScale;
-               const cache = me._scaleStacked = {};
-               if (iScale && vScale) {
-                       cache[iScale.id] = iScale.options.stacked;
-                       cache[vScale.id] = vScale.options.stacked;
-               }
-       }
-
        /**
         * @return {number|boolean}
         * @protected
@@ -710,7 +694,6 @@ export default class DatasetController {
                me._cachedDataOpts = {};
                me.update(mode);
                meta._clip = toClip(valueOrDefault(me._config.clip, defaultClip(meta.xScale, meta.yScale, me.getMaxOverflow())));
-               me._cacheScaleStackStatus();
        }
 
        /**