Remove unused models

app/src/main/java/org/futo/circles/subscriptions/BillingResult.kt

-package org.futo.circles.subscriptions
-
-import com.android.billingclient.api.BillingClient
-
-sealed class BillingResult<out T> {
-    data class Success<out T>(val data: T) : BillingResult<T>()
-
-    data class Failure(@BillingClient.BillingResponseCode val code: Int) : BillingResult<Nothing>()
-    object FeatureNotSupported : BillingResult<Nothing>()
-    object NotConnected : BillingResult<Nothing>()
-}
-
-fun <T> BillingResult<T>.unwrap(): T? = (this as? BillingResult.Success)?.data
\ No newline at end of file

app/src/main/java/org/futo/circles/subscriptions/SubscriptionData.kt

-package org.futo.circles.subscriptions
-
-import com.android.billingclient.api.ProductDetails
-import org.futo.circles.core.list.IdEntity
-
-data class SubscriptionData(
-    val details: ProductDetails
-) : IdEntity<String> {
-    override val id: String = details.productId
-}
\ No newline at end of file