Drop Guava from dependency

app/src/main/java/xyz/quaver/pupil/services/DownloadService.kt

@@ -29,7 +29,6 @@ import androidx.core.app.NotificationCompat
 import androidx.core.app.NotificationManagerCompat
 import androidx.core.app.TaskStackBuilder
 import androidx.core.content.ContextCompat
-import com.google.common.util.concurrent.RateLimiter
 import com.google.firebase.crashlytics.FirebaseCrashlytics
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
@@ -166,9 +165,6 @@ class DownloadService : Service() {
         }
     }
 
-    private val rateLimiter = RateLimiter.create(2.0)
-    private val rateLimitHost = Regex("..?\\.hitomi.la")
-
     private val interceptor: PupilInterceptor = { chain ->
         val request = chain.request()