Revert "Fix headers not scrolling"

This reverts commit b4104f8.

Author: devongovett

packages/@react-aria/virtualizer/src/VirtualizerItem.tsx

@@ -79,7 +79,7 @@ export function layoutInfoToStyle(
     WebkitTransition: 'all',
     WebkitTransitionDuration: 'inherit',
     transitionDuration: 'inherit',
-    width: isFullWidth && layoutInfo.shouldMatchParentWidth ? '100%' : layoutInfo.rect.width,
+    width: isFullWidth ? '100%' : layoutInfo.rect.width,
     height: layoutInfo.rect.height,
     opacity: layoutInfo.opacity,
     zIndex: layoutInfo.zIndex,

packages/@react-stately/layout/src/TableLayout.ts

@@ -152,7 +152,6 @@ export class TableLayout<T> extends ListLayout<T> {
   buildHeader(): LayoutNode {
     let rect = new Rect(0, 0, 0, 0);
     let layoutInfo = new LayoutInfo('header', 'header', rect);
-    layoutInfo.shouldMatchParentWidth = false;
 
     let y = 0;
     let width = 0;

packages/@react-stately/virtualizer/src/LayoutInfo.ts

@@ -72,13 +72,6 @@ export class LayoutInfo {
    */
   allowOverflow: boolean;
 
-  /**
-   * Whether the layout info should match the parent's pixel width or be a block/percent
-   * when an element should be full width.
-   * @default true
-   */
-  shouldMatchParentWidth: boolean = true;
-
   /**
    * @param type A string representing the view type. Should be `'item'` for item views.
                             Other types are used by supplementary views.
@@ -110,7 +103,6 @@ export class LayoutInfo {
     res.isSticky = this.isSticky;
     res.zIndex = this.zIndex;
     res.allowOverflow = this.allowOverflow;
-    res.shouldMatchParentWidth = this.shouldMatchParentWidth;
     return res;
   }
 }