undo unneeded changes

src/components/structures/MainSplit.js

@@ -72,16 +72,12 @@ export default class MainSplit extends React.Component {
 
     componentDidUpdate(prevProps) {
         const shouldAllowResizing =
-            !this.props.disableSizing &&
             !this.props.collapsedRhs &&
             this.props.panel;
 
         if (shouldAllowResizing && !this.resizer) {
             this._createResizer();
         } else if (!shouldAllowResizing && this.resizer) {
-            if (this.props.disableSizing) {
-                this.resizer.clearItemSizes();
-            }
             this.resizer.detach();
             this.resizer = null;
         }

src/resizer/resizer.js

@@ -43,14 +43,6 @@ export class Resizer {
         this._onMouseDown = this._onMouseDown.bind(this);
     }
 
-    clearItemSizes() {
-        const handles = this._getResizeHandles();
-        handles.forEach((handle) => {
-            const {sizer, item} = this._createSizerAndDistributor(handle);
-            sizer.clearItemSize(item);
-        });
-    }
-
     setClassNames(classNames) {
         this.classNames = classNames;
     }
@@ -142,7 +134,7 @@ export class Resizer {
         const distributor = new this.distributorCtor(
             sizer, item, id, this.distributorCfg,
             items, this.container);
-        return {sizer, distributor, item};
+        return {sizer, distributor};
     }
 
     _getResizableItems() {

src/resizer/sizer.js

@@ -82,14 +82,6 @@ class Sizer {
         }
     }
 
-    clearItemSize(item, size) {
-        if (this.vertical) {
-            item.style.height = null;
-        } else {
-            item.style.width = null;
-        }
-    }
-
     /**
         @param {MouseEvent} event the mouse event
         @return {number} the distance between the cursor and the edge of the container,