Consolidate FingerprintManager revokeChallenge

Bug: 181977689
Test: inspect logs
Change-Id: Ie26d49b4feda627964358166100f53a41b5fee20

core/java/android/hardware/fingerprint/FingerprintManager.java

@@ -685,17 +685,6 @@ public class FingerprintManager implements BiometricAuthenticator, BiometricFing
         generateChallenge(sensorProps.sensorId, userId, callback);
     }
 
-    /**
-     * Revokes the current challenge.
-     * @hide
-     */
-    @RequiresPermission(MANAGE_FINGERPRINT)
-    public void revokeChallenge(int userId) {
-        // On HALs with only single in-flight challenge such as IBiometricsFingerprint@2.1,
-        // this parameter is ignored.
-        revokeChallenge(userId, 0L);
-    }
-
     /**
      * Revokes the specified challenge.
      * @hide