Drop IncludeTags

This was previously used in conjunction with blueprint_package_includes
to prune Android.bp files from soong analysis.

Test: m nothing
Bug: 308188212
Change-Id: Ie82e20eec63bd0be70e1cf0290c70f62d5621c76

cmd/soong_build/main.go

@@ -98,7 +98,6 @@ func newContext(configuration android.Config) *android.Context {
 	ctx := android.NewContext(configuration)
 	ctx.SetNameInterface(newNameResolver(configuration))
 	ctx.SetAllowMissingDependencies(configuration.AllowMissingDependencies())
-	ctx.AddIncludeTags(configuration.IncludeTags()...)
 	ctx.AddSourceRootDirs(configuration.SourceRootDirs()...)
 	return ctx
 }