Back out "[react-native][PR] [fix] Fixing overscrolling issue on Virtualized List"

Summary:
Reverting this change since it broke some initial scroll positions. It seems the proper API to use to limit overscrolling should be overScrollMode='never'

Original commit changeset: 2ec5787218ec

Reviewed By: olegbl

Differential Revision: D13845053

fbshipit-source-id: 673aa529ef5171f26ce138573ee36f31f5d9799e

Libraries/Lists/VirtualizedList.js

@@ -330,20 +330,13 @@ class VirtualizedList extends React.PureComponent<Props, State> {
       return;
     }
     const frame = this._getFrameMetricsApprox(index);
-    const maxScroll =
-      this._scrollMetrics.contentLength - this._scrollMetrics.visibleLength;
-    let offset =
+    const offset =
       Math.max(
         0,
         frame.offset -
           (viewPosition || 0) *
             (this._scrollMetrics.visibleLength - frame.length),
       ) - (viewOffset || 0);
-
-    /* Fix for overscrolling */
-    if (offset > maxScroll) {
-      offset = maxScroll;
-    }
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