[flutter_adaptive_scaffold] Remove broken link from README (#6364)

The document this linked to is no longer accessible (possibly overrun with spam?), and we don't have a way to recover it. Given that, remove the link.

Fixes flutter/flutter#145292

Author: stuartmorgan-g

packages/flutter_adaptive_scaffold/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.1.10+1
+
+* Removes a broken design document link from the README.
+
 ## 0.1.10
 
 * FIX : Assertion added when tried with less than 2 destinations - [flutter/flutter#110902](https://github.com/flutter/flutter/issues/110902)

packages/flutter_adaptive_scaffold/README.md

@@ -247,8 +247,3 @@ return AdaptiveLayout(
 
 Both of the examples shown here produce the same output:
 !["Example of a display made with AdaptiveScaffold"](example/demo_files/adaptiveScaffold.gif)
-
-## Additional information
-
-You can find more information on this package and its usage in the public
-[design doc](https://docs.google.com/document/d/1qhrpTWYs5f67X8v32NCCNTRMIjSrVHuaMEFAul-Q_Ms/edit?usp=sharing).

packages/flutter_adaptive_scaffold/pubspec.yaml

@@ -1,6 +1,6 @@
 name: flutter_adaptive_scaffold
 description: Widgets to easily build adaptive layouts, including navigation elements.
-version: 0.1.10
+version: 0.1.10+1
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+flutter_adaptive_scaffold%22
 repository: https://github.com/flutter/packages/tree/main/packages/flutter_adaptive_scaffold