Minor cleanup

app/src/main/java/eu/kanade/tachiyomi/util/lang/RxCoroutineBridge.kt

@@ -5,17 +5,10 @@ import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.CoroutineStart
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.GlobalScope
-import kotlinx.coroutines.channels.awaitClose
-import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.callbackFlow
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.suspendCancellableCoroutine
 import rx.Emitter
 import rx.Observable
-import rx.Observer
-import rx.Scheduler
-import rx.Single
-import rx.SingleSubscriber
 import rx.Subscriber
 import rx.Subscription
 import kotlin.coroutines.resume
@@ -25,45 +18,6 @@ import kotlin.coroutines.resumeWithException
  * Util functions for bridging RxJava and coroutines. Taken from TachiyomiEH/SY.
  */
 
-suspend fun <T> Single<T>.await(subscribeOn: Scheduler? = null): T {
-    return suspendCancellableCoroutine { continuation ->
-        val self = if (subscribeOn != null) subscribeOn(subscribeOn) else this
-        lateinit var sub: Subscription
-        sub = self.subscribe(
-            {
-                continuation.resume(it) {
-                    sub.unsubscribe()
-                }
-            },
-            {
-                if (!continuation.isCancelled) {
-                    continuation.resumeWithException(it)
-                }
-            }
-        )
-
-        continuation.invokeOnCancellation {
-            sub.unsubscribe()
-        }
-    }
-}
-
-suspend fun <T> Single<T>.await(): T = suspendCancellableCoroutine { cont ->
-    cont.unsubscribeOnCancellation(
-        subscribe(
-            object : SingleSubscriber<T>() {
-                override fun onSuccess(t: T) {
-                    cont.resume(t)
-                }
-
-                override fun onError(error: Throwable) {
-                    cont.resumeWithException(error)
-                }
-            }
-        )
-    )
-}
-
 suspend fun <T> Observable<T>.awaitSingle(): T = single().awaitOne()
 
 private suspend fun <T> Observable<T>.awaitOne(): T = suspendCancellableCoroutine { cont ->
@@ -105,24 +59,6 @@ private suspend fun <T> Observable<T>.awaitOne(): T = suspendCancellableCoroutin
 internal fun <T> CancellableContinuation<T>.unsubscribeOnCancellation(sub: Subscription) =
     invokeOnCancellation { sub.unsubscribe() }
 
-fun <T : Any> Observable<T>.asFlow(): Flow<T> = callbackFlow {
-    val observer = object : Observer<T> {
-        override fun onNext(t: T) {
-            offer(t)
-        }
-
-        override fun onError(e: Throwable) {
-            close(e)
-        }
-
-        override fun onCompleted() {
-            close()
-        }
-    }
-    val subscription = subscribe(observer)
-    awaitClose { subscription.unsubscribe() }
-}
-
 fun <T> runAsObservable(
     block: suspend () -> T,
     backpressureMode: Emitter.BackpressureMode = Emitter.BackpressureMode.NONE