Remove iron workflows and update readme (#1338) (#1374)

Co-authored-by: Christoph Fröhlich <[email protected]>
Co-authored-by: Dr. Denis <[email protected]>

.github/dependabot.yml

@@ -0,0 +1,20 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    # Workflow files stored in the
+    # default location of `.github/workflows`
+    directory: "/"
+    schedule:
+      interval: "weekly"
+  - package-ecosystem: "github-actions"
+    # Workflow files stored in the
+    # default location of `.github/workflows`
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    target-branch: "humble"

.github/mergify.yml

@@ -1,21 +1,4 @@
 pull_request_rules:
-  - name: Backport to galactic at reviewers discretion
-    conditions:
-      - base=master
-      - "label=backport-galactic"
-    actions:
-      backport:
-        branches:
-          - galactic
-
-  - name: Backport to foxy at reviewers discretion
-    conditions:
-      - base=master
-      - "label=backport-foxy"
-    actions:
-      backport:
-        branches:
-          - foxy
 
   - name: Ask to resolve conflict
     conditions:

README.md

@@ -11,7 +11,6 @@ ROS2 Distro | Branch | Build status | Documentation | Released packages
 :---------: | :----: | :----------: | :-----------: | :---------------:
 **Rolling** | [`master`](https://github.com/ros-controls/ros2_controllers/tree/master) | [![Rolling Binary Build](https://github.com/ros-controls/ros2_controllers/actions/workflows/rolling-binary-build.yml/badge.svg?branch=master)](https://github.com/ros-controls/ros2_controllers/actions/workflows/rolling-binary-build.yml?branch=master) <br /> [![Rolling Semi-Binary Build](https://github.com/ros-controls/ros2_controllers/actions/workflows/rolling-semi-binary-build.yml/badge.svg?branch=master)](https://github.com/ros-controls/ros2_controllers/actions/workflows/rolling-semi-binary-build.yml?branch=master) | [control.ros.org](https://control.ros.org/master/doc/ros2_controllers/doc/controllers_index.html) | [ros2_controllers](https://index.ros.org/p/ros2_controllers/#rolling)
 **Jazzy** | [`master`](https://github.com/ros-controls/ros2_controllers/tree/master) | [![Jazzy Binary Build](https://github.com/ros-controls/ros2_controllers/actions/workflows/jazzy-binary-build.yml/badge.svg?branch=master)](https://github.com/ros-controls/ros2_controllers/actions/workflows/jazzy-binary-build.yml?branch=master) <br /> [![Jazzy Semi-Binary Build](https://github.com/ros-controls/ros2_controllers/actions/workflows/jazzy-semi-binary-build.yml/badge.svg?branch=master)](https://github.com/ros-controls/ros2_controllers/actions/workflows/jazzy-semi-binary-build.yml?branch=master) | [control.ros.org](https://control.ros.org/jazzy/doc/ros2_controllers/doc/controllers_index.html) | [ros2_controllers](https://index.ros.org/p/ros2_controllers/#jazzy)
-**Iron** | [`iron`](https://github.com/ros-controls/ros2_controllers/tree/iron) | [![Iron Binary Build](https://github.com/ros-controls/ros2_controllers/actions/workflows/iron-binary-build.yml/badge.svg?branch=master)](https://github.com/ros-controls/ros2_controllers/actions/workflows/iron-binary-build.yml?branch=master) <br /> [![Iron Semi-Binary Build](https://github.com/ros-controls/ros2_controllers/actions/workflows/iron-semi-binary-build.yml/badge.svg?branch=master)](https://github.com/ros-controls/ros2_controllers/actions/workflows/iron-semi-binary-build.yml?branch=master) | [control.ros.org](https://control.ros.org/iron/doc/ros2_controllers/doc/controllers_index.html) | [ros2_controllers](https://index.ros.org/p/ros2_controllers/#iron)
 **Humble** | [`humble`](https://github.com/ros-controls/ros2_controllers/tree/humble) | [![Humble Binary Build](https://github.com/ros-controls/ros2_controllers/actions/workflows/humble-binary-build.yml/badge.svg?branch=master)](https://github.com/ros-controls/ros2_controllers/actions/workflows/humble-binary-build.yml?branch=master) <br /> [![Humble Semi-Binary Build](https://github.com/ros-controls/ros2_controllers/actions/workflows/humble-semi-binary-build.yml/badge.svg?branch=master)](https://github.com/ros-controls/ros2_controllers/actions/workflows/humble-semi-binary-build.yml?branch=master) | [control.ros.org](https://control.ros.org/humble/doc/ros2_controllers/doc/controllers_index.html) | [ros2_controllers](https://index.ros.org/p/ros2_controllers/#humble)
 
 ### Explanation of different build types