Revert "fix: 🐛 Fixed RecalculateRootWidgetSize null check issue. (SimformSolutionsPvtLtd#429)"

This reverts commit 49fa2e1.

Author: Dushant-Bansal

CHANGELOG.md

@@ -7,7 +7,6 @@
 
 ## [2.1.1]
 - Fixed [#425](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/issues/425) - Unhandled breaking change in v2.1.0
-- Fixed [#428](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/issues/428) - _ShowcaseState.recalculateRootWidgetSize null value
 
 ## [2.1.0]
 - Feature [#420](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/pull/420) - Dart SDK Upgrade