style: remove unnecessary companion imports

Follow-up for ankidroid#20747

Also a small comment change requested by David!

Author: ericli3690

AnkiDroid/src/main/java/com/ichi2/anki/AnkiDroidApp.kt

@@ -96,7 +96,8 @@ open class AnkiDroidApp :
     var progressDialogShown = false
 
     /**
-     * On application creation.
+     * On application creation, i.e. when the application process starts.
+     * This is called before any activities, services, or receivers are created.
      */
     @KotlinCleanup("analytics can be moved to attachBaseContext()")
     override fun onCreate() {

AnkiDroid/src/main/java/com/ichi2/anki/services/AlarmManagerService.kt

@@ -30,10 +30,6 @@ import com.ichi2.anki.android.AnkiBroadcastReceiver
 import com.ichi2.anki.common.time.TimeManager
 import com.ichi2.anki.reviewreminders.ReviewReminder
 import com.ichi2.anki.reviewreminders.ReviewRemindersDatabase
-import com.ichi2.anki.services.AlarmManagerService.Companion.WINDOW_LENGTH_MS
-import com.ichi2.anki.services.AlarmManagerService.Companion.getIntent
-import com.ichi2.anki.services.AlarmManagerService.Companion.scheduleAllEnabledReviewReminderNotifications
-import com.ichi2.anki.services.AlarmManagerService.Companion.unscheduleReviewReminderNotifications
 import com.ichi2.anki.showThemedToast
 import timber.log.Timber
 import java.util.Calendar

AnkiDroid/src/main/java/com/ichi2/anki/services/NotificationService.kt

@@ -41,8 +41,6 @@ import com.ichi2.anki.reviewreminders.ReviewReminder
 import com.ichi2.anki.reviewreminders.ReviewReminderScope
 import com.ichi2.anki.reviewreminders.ReviewRemindersDatabase
 import com.ichi2.anki.runGloballyWithTimeout
-import com.ichi2.anki.services.NotificationService.Companion.addAction
-import com.ichi2.anki.services.NotificationService.Companion.getIntent
 import com.ichi2.anki.settings.Prefs
 import com.ichi2.anki.utils.ext.allDecksCounts
 import com.ichi2.anki.utils.remainingTime