Absorb the matrix-react-sdk repository (#28192)

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Co-authored-by: Florian Duros <florian.duros@ormaz.fr>
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Co-authored-by: Florian Duros <florianduros@element.io>
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docs/release.md

@@ -22,7 +22,7 @@ The master branch is the most stable as it is the very latest non-RC release. De
 
 <details><summary><h1>Versions</h1></summary><blockquote>
 
-The matrix-js-sdk follows semver, the matrix-react-sdk loosely follows semver, most releases for both will bump the minor version number.
+The matrix-js-sdk follows semver, most releases will bump the minor version number.
 Breaking changes will bump the major version number.
 Element Web & Element Desktop do not follow semver and always have matching version numbers. The patch version number is normally incremented for every release.
 
@@ -80,11 +80,10 @@ This label will automagically convert to `X-Release-Blocker` at the conclusion o
 
 <details><summary><h1>Repositories</h1></summary><blockquote>
 
-This release process revolves around our four main repositories:
+This release process revolves around our main repositories:
 
 -   [Element Desktop](https://github.com/element-hq/element-desktop/)
 -   [Element Web](https://github.com/element-hq/element-web/)
--   [Matrix React SDK](https://github.com/matrix-org/matrix-react-sdk/)
 -   [Matrix JS SDK](https://github.com/matrix-org/matrix-js-sdk/)
 
 We own other repositories, but they have more ad-hoc releases and are not part of the bi-weekly cycle:
@@ -117,14 +116,13 @@ flowchart TD
 
     subgraph Releasing
         R1[[Releasing matrix-js-sdk]]
-        R2[[Releasing matrix-react-sdk]]
-        R3[[Releasing element-web]]
-        R4[[Releasing element-desktop]]
+        R2[[Releasing element-web]]
+        R3[[Releasing element-desktop]]
 
-        R1 --> R2 --> R3 --> R4
+        R1 --> R2 --> R3
     end
 
-    R4 --> D1
+    R3 --> D1
 
     subgraph Deploying
         D1[\Deploy staging.element.io/]
@@ -198,12 +196,6 @@ switched back to the version of the dependency from the master branch to not lea
 -   [ ] Make any changes to the release notes in the draft release as are necessary - **Do not click publish, only save draft**
 -   [ ] Kick off a release using [the automation](https://github.com/matrix-org/matrix-js-sdk/actions/workflows/release.yml) - making sure to select the right type of release. For anything other than an RC: choose final. You should not need to ever switch off either of the Publishing options.
 
-### Matrix React SDK
-
--   [ ] Check the draft release which has been generated by [the automation](https://github.com/element-hq/matrix-react-sdk/actions/workflows/release-drafter.yml)
--   [ ] Make any changes to the release notes in the draft release as are necessary - **Do not click publish, only save draft**
--   [ ] Kick off a release using [the automation](https://github.com/element-hq/matrix-react-sdk/actions/workflows/release.yml) - making sure to select the right type of release. For anything other than an RC: choose final. You should not need to ever switch off either of the Publishing options.
-
 ### Element Web
 
 -   [ ] Check the draft release which has been generated by [the automation](https://github.com/element-hq/element-web/actions/workflows/release-drafter.yml)
@@ -256,8 +248,6 @@ For the first RC of a given release cycle do these steps:
 
 -   [ ] Go to the [matrix-js-sdk Renovate dashboard](https://github.com/matrix-org/matrix-js-sdk/issues/2406) and click the checkbox to create/update its PRs.
 
--   [ ] Go to the [matrix-react-sdk Renovate dashboard](https://github.com/element-hq/matrix-react-sdk/issues/6) and click the checkbox to create/update its PRs.
-
 -   [ ] Go to the [element-web Renovate dashboard](https://github.com/element-hq/element-web/issues/22941) and click the checkbox to create/update its PRs.
 
 -   [ ] Go to the [element-desktop Renovate dashboard](https://github.com/element-hq/element-desktop/issues/465) and click the checkbox to create/update its PRs.