Update GCMRegistrationScheduler.kt

- mark workManager private
- remove unused cancelScheduleRegistration

Author: ravishanker

WordPress/src/main/java/org/wordpress/android/push/GCMRegistrationScheduler.kt

@@ -10,7 +10,7 @@ import javax.inject.Inject
 class GCMRegistrationScheduler @Inject constructor(
     val contextProvider: ContextProvider
 ) {
-    val workManager by lazy { WorkManager.getInstance(contextProvider.getContext()) }
+    private val workManager by lazy { WorkManager.getInstance(contextProvider.getContext()) }
 
     fun scheduleRegistration() {
         workManager.enqueueUniqueWork(
@@ -20,10 +20,6 @@ class GCMRegistrationScheduler @Inject constructor(
         )
     }
 
-    fun cancelScheduledRegistration() {
-        workManager.cancelAllWorkByTag(UNIQUE_WORK_NAME)
-    }
-
     private fun buildOneTimeWorkRequest() =
         OneTimeWorkRequestBuilder<GCMRegistrationWorker>()
             .addTag(UNIQUE_WORK_NAME)