Updated reactor docs

Author: elizarov

reactive/kotlinx-coroutines-reactor/README.md

@@ -26,7 +26,6 @@ Conversion functions:
 <!--- INDEX kotlinx.coroutines.experimental -->
 [CoroutineScope]: https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines.experimental/-coroutine-scope/index.html
 [CoroutineDispatcher]: https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines.experimental/-coroutine-dispatcher/index.html
-[Delay]: https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines.experimental/-delay/index.html
 <!--- INDEX kotlinx.coroutines.experimental.channels -->
 <!--- MODULE kotlinx-coroutines-reactor -->
 <!--- INDEX kotlinx.coroutines.experimental.reactor -->