Remove gitter from docs (#1650)

Co-authored-by: alrex <[email protected]>

Author: lzchen

CONTRIBUTING.md

@@ -6,7 +6,7 @@ information on this and other language SIGs.
 
 See the [public meeting notes](https://docs.google.com/document/d/1CIMGoIOZ-c3-igzbd6_Pnxx1SjAkjwqoYSUWxPY8XIs/edit)
 for a summary description of past meetings. To request edit access, join the
-meeting or get in touch on [Gitter](https://gitter.im/open-telemetry/opentelemetry-python).
+meeting or get in touch on [Slack](https://cloud-native.slack.com/archives/C01PD4HUVBL).
 
 See to the [community membership document](https://github.com/open-telemetry/community/blob/main/community-membership.md)
 on how to become a [**Member**](https://github.com/open-telemetry/community/blob/main/community-membership.md#member),
@@ -20,7 +20,7 @@ Please take a look at this list first, your contributions may belong in one of t
 
 1. [OpenTelemetry Contrib](https://github.com/open-telemetry/opentelemetry-python-contrib): Instrumentations for third-party
    libraries and frameworks. There is an ongoing effort to migrate into the Opentelemetry Contrib repo some of the existing
-   programmatic instrumentations that are now in the `ext` directory in the main OpenTelemetry repo. Please ask in the Gitter
+   programmatic instrumentations that are now in the `ext` directory in the main OpenTelemetry repo. Please ask in the Slack
    channel (see below) for guidance if you want to contribute with these instrumentations.
 
 # Find the right branch
@@ -30,12 +30,15 @@ The default branch for this repo is `main`. Changes that pertain to `metrics` go
 ## Find a Buddy and get Started Quickly!
 
 If you are looking for someone to help you find a starting point and be a resource for your first contribution, join our
-Gitter and find a buddy!
+Slack and find a buddy!
 
-1. Join [Gitter.im](https://gitter.im) and join our [chat room](https://gitter.im/open-telemetry/opentelemetry-python).
+1. Join [Slack](https://slack.cncf.io/) and join our [channel](https://cloud-native.slack.com/archives/C01PD4HUVBL).
 2. Post in the room with an introduction to yourself, what area you are interested in (check issues marked "Help Wanted"),
 and say you are looking for a buddy. We will match you with someone who has experience in that area.
 
+The Slack channel will be used for introductions and an entry point for external people to be triaged and redirected. For
+discussions, please open up an issue or a Github [Discussion](https://github.com/open-telemetry/opentelemetry-python/discussions).
+
 Your OpenTelemetry buddy is your resource to talk to directly on all aspects of contributing to OpenTelemetry: providing
 context, reviewing PRs, and helping those get merged. Buddies will not be available 24/7, but is committed to responding
 during their normal contribution hours.

README.md

@@ -127,13 +127,9 @@ Meeting notes are available as a public [Google doc](https://docs.google.com/doc
 Approvers ([@open-telemetry/python-approvers](https://github.com/orgs/open-telemetry/teams/python-approvers)):
 
 - [Aaron Abbott](https://github.com/aabmass), Google
-- [Carlos Alberto Cortez](https://github.com/carlosalberto), Lightstep
-- [Tahir H. Butt](https://github.com/majorgreys) DataDog
-- [Chris Kleinknecht](https://github.com/c24t), Google
 - [Diego Hurtado](https://github.com/ocelotl)
 - [Hector Hernandez](https://github.com/hectorhdzg), Microsoft
 - [Owais Lone](https://github.com/owais), Splunk
-- [Reiley Yang](https://github.com/reyang), Microsoft
 - [Yusuke Tsutsumi](https://github.com/toumorokoshi), Google
 
 *For more information about the approver role, see the [community repository](https://github.com/open-telemetry/community/blob/main/community-membership.md#approver).*

docs/index.rst

@@ -3,9 +3,9 @@ OpenTelemetry-Python
 
 The Python `OpenTelemetry <https://opentelemetry.io/>`_ client.
 
-.. image:: https://img.shields.io/gitter/room/opentelemetry/opentelemetry-python
-   :target: https://gitter.im/open-telemetry/opentelemetry-python
-   :alt: Gitter Chat
+.. image:: https://img.shields.io/badge/slack-chat-green.svg
+   :target: https://cloud-native.slack.com/archives/C01PD4HUVBL
+   :alt: Slack Chat
 
 
 This documentation describes the :doc:`opentelemetry-api <api/api>`,