remove unused PercentageDistributor

it's not used and we need to make some
api changes that don't work with it (resize will receive itemSize
which it doesn't really support)

src/resizer/distributors.js

@@ -73,55 +73,7 @@ class CollapseDistributor extends FixedDistributor {
     }
 }
 
-class PercentageDistributor {
-    constructor(sizer, item, _config, items, container) {
-        this.container = container;
-        this.totalSize = sizer.getTotalSize();
-        this.sizer = sizer;
-
-        const itemIndex = items.indexOf(item);
-        this.beforeItems = items.slice(0, itemIndex);
-        this.afterItems = items.slice(itemIndex);
-        const percentages = PercentageDistributor._getPercentages(sizer, items);
-        this.beforePercentages = percentages.slice(0, itemIndex);
-        this.afterPercentages = percentages.slice(itemIndex);
-    }
-
-    resize(offset) {
-        const percent = offset / this.totalSize;
-        const beforeSum =
-            this.beforePercentages.reduce((total, p) => total + p, 0);
-        const beforePercentages =
-            this.beforePercentages.map(p => (p / beforeSum) * percent);
-        const afterSum =
-            this.afterPercentages.reduce((total, p) => total + p, 0);
-        const afterPercentages =
-            this.afterPercentages.map(p => (p / afterSum) * (1 - percent));
-
-        this.beforeItems.forEach((item, index) => {
-            this.sizer.setItemPercentage(item, beforePercentages[index]);
-        });
-        this.afterItems.forEach((item, index) => {
-            this.sizer.setItemPercentage(item, afterPercentages[index]);
-        });
-    }
-
-    static _getPercentages(sizer, items) {
-        const percentages = items.map(i => sizer.getItemPercentage(i));
-        const setPercentages = percentages.filter(p => p !== null);
-        const unsetCount = percentages.length - setPercentages.length;
-        const setTotal = setPercentages.reduce((total, p) => total + p, 0);
-        const implicitPercentage = (1 - setTotal) / unsetCount;
-        return percentages.map(p => p === null ? implicitPercentage : p);
-    }
-
-    static setPercentage(el, percent) {
-        el.style.flexGrow = Math.round(percent * 1000);
-    }
-}
-
 module.exports = {
     FixedDistributor,
     CollapseDistributor,
-    PercentageDistributor,
 };

src/resizer/index.js

@@ -15,7 +15,7 @@ limitations under the License.
 */
 
 import {Sizer, FlexSizer} from "./sizer";
-import {FixedDistributor, CollapseDistributor, PercentageDistributor} from "./distributors";
+import {FixedDistributor, CollapseDistributor} from "./distributors";
 import {Resizer} from "./resizer";
 import {RoomSizer, RoomDistributor} from "./room";
 
@@ -25,7 +25,6 @@ module.exports = {
     FlexSizer,
     FixedDistributor,
     CollapseDistributor,
-    PercentageDistributor,
     RoomSizer,
     RoomDistributor,
 };