Remove code related to `composeNavigator` in `NavHost` since it seems… #112

Job	Run time
check (ubuntu-latest)	2m 54s
dependency-submission (ubuntu-latest)	1m 49s
check (macos-latest)	3m 11s
dependency-submission (macos-latest)	1m 57s
check (windows-latest)	2m 56s
dependency-submission (windows-latest)	2m 58s
	15m 45s

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