package/flutter-sdk-bin/Config.in.host: remove comment

flutter-sdk-bin isn't a rust package.

Signed-off-by: Adam Duskett <adam.duskett@amarulasolutions.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/flutter-sdk-bin/Config.in.host

@@ -1,4 +1,3 @@
-# All host rust packages should depend on this option
 config BR2_PACKAGE_HOST_FLUTTER_SDK_BIN_ARCH_SUPPORTS
 	bool
 	default y if BR2_HOSTARCH = "x86_64"