Fix build

mirai-core/src/jvmMain/kotlin/net/mamoe/mirai/utils/internal/DeferredReusableInput.jvm.kt

@@ -5,7 +5,6 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import kotlinx.io.core.Input
 import net.mamoe.mirai.utils.FileCacheStrategy
-import net.mamoe.mirai.utils.MiraiExperimentalAPI
 import java.awt.image.BufferedImage
 import java.net.URL
 
@@ -45,5 +44,9 @@ internal actual class DeferredReusableInput actual constructor(
         return delegate?.writeTo(out) ?: error("DeferredReusableInput not yet initialized")
     }
 
+    override fun asInput(): Input {
+        return delegate?.asInput() ?: error("DeferredReusableInput not yet initialized")
+    }
+
     actual val initialized: Boolean get() = delegate != null
 }
\ No newline at end of file