Remove a couple of redundant comments.

bramble-android/src/main/java/org/briarproject/bramble/plugin/tor/AndroidTorPluginFactory.java

@@ -100,7 +100,7 @@ public class AndroidTorPluginFactory implements DuplexPluginFactory {
 			LOG.info("Tor is not supported on this architecture");
 			return null;
 		}
-		// Use position-independent executable for SDK >= 16
+		// Use position-independent executable
 		architecture += "_pie";
 
 		Backoff backoff = backoffFactory.createBackoff(MIN_POLLING_INTERVAL,

briar-android/src/main/java/org/briarproject/briar/android/BriarService.java

@@ -238,8 +238,6 @@ public class BriarService extends Service {
 		} else if (level == TRIM_MEMORY_RUNNING_LOW) {
 			LOG.info("Trim memory: running low");
 		} else if (level == TRIM_MEMORY_RUNNING_CRITICAL) {
-			// This level may be received if SDK_INT < 16, although the
-			// constant isn't declared until API level 16
 			LOG.warning("Trim memory: running critically low");
 			// If we're not in the foreground, clear the UI to save memory
 			if (app.isRunningInBackground()) hideUi();