Rm unused declaration

Author: Isira-Seneviratne

app/src/main/java/org/schabi/newpipe/ktx/Bundle.kt

@@ -1,25 +1,9 @@
 package org.schabi.newpipe.ktx
 
-import android.os.Build
 import android.os.Bundle
 import android.os.Parcelable
 import androidx.core.os.BundleCompat
-import java.io.Serializable
-import kotlin.reflect.safeCast
 
 inline fun <reified T : Parcelable> Bundle.parcelableArrayList(key: String?): ArrayList<T>? {
     return BundleCompat.getParcelableArrayList(this, key, T::class.java)
 }
-
-inline fun <reified T : Serializable> Bundle.serializable(key: String?): T? {
-    return getSerializable(this, key, T::class.java)
-}
-
-fun <T : Serializable> getSerializable(bundle: Bundle, key: String?, clazz: Class<T>): T? {
-    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE) {
-        bundle.getSerializable(key, clazz)
-    } else {
-        @Suppress("DEPRECATION")
-        clazz.kotlin.safeCast(bundle.getSerializable(key))
-    }
-}