Removed spare Element checking in OnDetachedFrom

[rafalka]

Description of Change

Take look into OnDetachedFrom()

	protected override void OnDetachedFrom(VisualElement bindable, AView platformView)
	{
		base.OnDetachedFrom(bindable, platformView);

		view = platformView;

		if (Element is null)
		{
			return;
		}
...

We exiting when Element is null.
The thing is that Element is always null because it returns a View and base.OnDetachedFrom() calls UnassignViewAndBingingContext() which sets it to null.

Linked Issues

• Fixes [BUG] TouchBehavior Memory Leak once the behavior has been included in a DataTemplate #2082

PR Checklist

• [x ] Has a linked Issue, and the Issue has been approved(bug) or Championed (feature/proposal)
• Has tests (if omitted, state reason in description)
• Has samples (if omitted, state reason in description)
• [x ] Rebased on top of main at time of PR
• [ x] Changes adhere to coding standard
• Documentation created or updated: https://github.com/MicrosoftDocs/CommunityToolkit/pulls

Sample code is not needed. You can check it using a CommunityToolkit.Maui.Sample by placing a breakpoint at
TouchBehaviou.android.cs:76 (or somewhere else in OnDetachedFrom()) and checking an Element.

Additional information

[bijington]

LGTM! Thank you