Prune commentary and stale Rust port notes

src/android/platform.rs

@@ -22,16 +22,10 @@ impl<T: HasAndroidUiState> OpenUrl for T {
     }
 }
 
-/// `startActivity(new Intent(ACTION_VIEW, Uri.parse(url)))` on the view's
-/// own context.
-///
 /// `FLAG_ACTIVITY_NEW_TASK` because the context here is the view's, which
 /// may be an application context rather than the activity's -- Android
 /// throws `AndroidRuntimeException` for a non-activity context without it,
 /// and it is harmless when the context *is* an activity's.
-///
-/// Every failure is logged with the URL and returns; there is nothing to
-/// fall back to, and the reader will see that nothing happened.
 pub(super) fn open_url<'local>(env: &mut JNIEnv<'local>, view: &View<'local>, url: &str) {
     match try_open_url(env, view, url) {
         Ok(()) => {}