MM-52144 : Remove stub package "@types/react-day-picker" (#22945)

This package was added during the resolution of issues with Boards CI tests. This pull request isolates and tests the package's impact after recent npm changes. It was found that removing the stub package did not result in any issues.

webapp/boards/package.json

@@ -95,7 +95,6 @@
 		"@types/node": "16.11.7",
 		"@types/react": "17.0.53",
 		"@types/react-beautiful-dnd": "^13.1.2",
-		"@types/react-day-picker": "5.3.0",
 		"@types/react-dom": "17.0.19",
 		"@types/react-redux": "^7.1.23",
 		"@types/react-router-dom": "^5.3.3",