Remove more mentions of gitter

CONTRIBUTING.md

@@ -3,8 +3,7 @@
 Thanks for your interest in contributing to Diesel! We very much look forward to
 your suggestions, bug reports, and pull requests.
 
-We run an active [Gitter
-channel](https://gitter.im/diesel-rs/diesel) where you can ask Diesel-related questions and
+We run an active [discussion forum](https://github.com/diesel-rs/diesel/discussions) where you can ask Diesel-related questions and
 get help. Feel free to ask there before opening a GitHub issue or
 pull request.
 

README.md

@@ -3,7 +3,6 @@
 # A safe, extensible ORM and Query Builder for Rust
 
 [![Build Status](https://github.com/diesel-rs/diesel/workflows/CI%20Tests/badge.svg)](https://github.com/diesel-rs/diesel/actions?query=workflow%3A%22CI+Tests%22+branch%3Amaster)
-[![Gitter](https://badges.gitter.im/diesel-rs/diesel.svg)](https://gitter.im/diesel-rs/diesel?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
 [![Crates.io](https://img.shields.io/crates/v/diesel.svg)](https://crates.io/crates/diesel)
 
 API Documentation: [latest release](https://docs.rs/diesel) – [master branch](https://docs.diesel.rs/master/diesel/index.html)

diesel_dynamic_schema/README.md

@@ -4,7 +4,6 @@ Query schemas not known at compile time with Diesel
 ===================================================
 
 [![Build Status](https://travis-ci.org/diesel-rs/diesel.svg)](https://travis-ci.org/diesel-rs/diesel-dynamic-schema)
-[![Gitter](https://badges.gitter.im/diesel-rs/diesel.svg)](https://gitter.im/diesel-rs/diesel?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
 
 API Documentation: [latest release](https://docs.rs/diesel-dynamic-schema)
 

diesel_dynamic_schema/src/lib.rs

@@ -71,9 +71,9 @@
 //!
 //! ## Getting help
 //!
-//! If you run into problems, Diesel has a very active Gitter room.
+//! If you run into problems, Diesel has a very active discussion forum.
 //! You can come ask for help at
-//! [gitter.im/diesel-rs/diesel](https://gitter.im/diesel-rs/diesel)
+//! [github.com/diesel-rs/diesel/discussions](https://github.com/diesel-rs/diesel/discussions)
 
 // Built-in Lints
 #![warn(missing_docs)]

guide_drafts/trait_derives.md

@@ -960,9 +960,9 @@ error[E0599]: no function or associated item named `belonging_to` found for type
 Please check out other [official guides] and [docs]
 for more information on using the Diesel framework.
 
-If you have any questions, join our [gitter channel],
+If you have any questions, join our [discussion forum],
 the Diesel team is happy to help.
 
 [official guides]: https://diesel.rs/guides/
 [docs]: https://docs.diesel.rs
-[gitter channel]: https://gitter.im/diesel-rs/diesel
+[discussion forum]: https://github.com/diesel-rs/diesel/discussions