Greg Spencer 6295289163

Remove deprecated PlatformMenuBar.body (#138509) ...

Part of https://github.com/flutter/flutter/issues/139243

## Description

This removes the `PlatformMenuBar.body` attribute and constructor parameter, since its deprecation period has elapsed.

## Tests
 - No tests were using the deprecated attribute, so no tests were removed.

#FlutterDeprecations

2023-11-29 18:13:50 +00:00

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app_bar_theme.dart

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app_bar_theme.dart.expect

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app_bar.dart

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app_bar.dart.expect

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color_scheme.dart

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color_scheme.dart.expect

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drag_target.dart

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drag_target.dart.expect

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material.dart

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material.dart.expect

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sliver_app_bar.dart

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sliver_app_bar.dart.expect

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text_theme.dart

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text_theme.dart.expect

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theme_data.dart

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theme_data.dart.expect

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