[O2B-1505] remove getStableBeamsOnly

Author: Houwie7000

lib/public/views/LhcFills/Overview/LhcFillsOverviewModel.js

@@ -94,15 +94,6 @@ export class LhcFillsOverviewModel extends OverviewPageModel {
         return this._beamDurationOperator;
     }
 
-    /**
-     * Checks if the stable beams filter is set
-     *
-     * @return {boolean} true if the stable beams filter is active
-     */
-    getStableBeamsOnly() {
-        return this._stableBeamsOnly;
-    }
-
     /**
      * Returns all filtering, sorting and pagination settings to their default values
      * @param {boolean} [fetch = true] whether to refetch all data after filters have been reset