Remove unused member.

Bug: 194817979
Test: N/A (builds)
Change-Id: I03da25ee045ee1f7c9d8e362fea0b189d6d17275

packages/SystemUI/src/com/android/keyguard/KeyguardListenModel.kt

@@ -1,20 +1,15 @@
 package com.android.keyguard
 
 import android.annotation.CurrentTimeMillisLong
-import android.hardware.biometrics.BiometricAuthenticator.Modality
-import android.hardware.biometrics.BiometricAuthenticator.TYPE_FACE
-import android.hardware.biometrics.BiometricAuthenticator.TYPE_FINGERPRINT
 
 /** Verbose logging for various keyguard listening states. */
 sealed class KeyguardListenModel {
     /** Timestamp of the state change. */
     abstract val timeMillis: Long
-    /** Current user */
+    /** Current user. */
     abstract val userId: Int
-    /** If keyguard is listening for the given [modality]. */
+    /** If keyguard is listening for the modality represented by this model. */
     abstract val listening: Boolean
-    /** Sensor type */
-    @Modality abstract val modality: Int
 }
 
 /**
@@ -45,9 +40,7 @@ data class KeyguardFingerprintListenModel(
     val udfps: Boolean,
     val userDoesNotHaveTrust: Boolean,
     val userNeedsStrongAuth: Boolean
-) : KeyguardListenModel() {
-    override val modality: Int = TYPE_FACE
-}
+) : KeyguardListenModel()
 
 /**
  * Verbose debug information associated with [KeyguardUpdateMonitor.shouldListenForFace].
@@ -72,6 +65,4 @@ data class KeyguardFaceListenModel(
     val scanningAllowedByStrongAuth: Boolean,
     val secureCameraLaunched: Boolean,
     val switchingUser: Boolean
-) : KeyguardListenModel() {
-    override val modality: Int = TYPE_FINGERPRINT
-}
+) : KeyguardListenModel()