Update integration/README.md (Kotlin#3485)

Fixes Kotlin#3484

Author: dkhalanskyjb

integration/README.md

@@ -1,28 +1,11 @@
 # Coroutines integration
 
 This directory contains modules that provide integration with various asynchronous callback- and future-based libraries.
-Module name below corresponds to the artifact name in Maven/Gradle.
+Module names below correspond to the artifact names in Maven/Gradle.
 
 ## Modules
 
 * [kotlinx-coroutines-jdk8](kotlinx-coroutines-jdk8/README.md) -- integration with JDK8 `CompletableFuture` (Android API level 24).
 * [kotlinx-coroutines-guava](kotlinx-coroutines-guava/README.md) -- integration with Guava [ListenableFuture](https://github.com/google/guava/wiki/ListenableFutureExplained).
 * [kotlinx-coroutines-slf4j](kotlinx-coroutines-slf4j/README.md) -- integration with SLF4J [MDC](https://logback.qos.ch/manual/mdc.html).
 * [kotlinx-coroutines-play-services](kotlinx-coroutines-play-services) -- integration with Google Play Services [Tasks API](https://developers.google.com/android/guides/tasks).
-
-## Contributing
-
-Follow the following simple guidelines when contributing integration with your favorite library:
-
-* Keep it simple and general. Ideally it should fit into a single file. If it does not fit, then consider
-  a separate GitHub project to host this integration.
-* Follow the example of other modules. 
-  Cut-and-paste [kotlinx-coroutines-guava](kotlinx-coroutines-guava) module as a template.
-* Write tests and documentation, include top-level `README.md` with short overview and example.
-* Reference the new module from all the places:
-  * List of modules in this document.
-  * List of modules in top-level [`settings.gradle`](../settings.gradle).
-  * List of modules at the root of documentation site in [`site/docs/index.md`](../site/docs/index.md).
-  * List of integrations in the root [README.md](../README.md).
-* Update links to documentation website as explained [here](../knit/README.md#usage).
-* Squash your contribution to a single commit and create pull request to `develop` branch.