Remove Python 3.9 (#496)

Signed-off-by: Pablo Garrido <pablogs9@gmail.com>
(cherry picked from commit d327cba)

Author: pablogs9

.github/workflows/ci.yml

@@ -52,8 +52,6 @@ jobs:
       - name: dependencies
         run: |
           apt update
-          # Workaround. Remove when https://discourse.ros.org/t/preparing-for-rolling-sync-delayed-by-python-3-10-transition/24521 solved
-          apt install -y python3.9-dev
           apt install -y python3-colcon-metadata python3-pip
           rosdep update --rosdistro $ROS_DISTRO
           rosdep install -y --from-paths src --ignore-src -y
@@ -195,8 +193,6 @@ jobs:
         run: |
           apt update
           apt upgrade -y
-          # Workaround. Remove when https://discourse.ros.org/t/preparing-for-rolling-sync-delayed-by-python-3-10-transition/24521 solved
-          apt install -y python3.9-dev
           # Install last version of CMake
           apt install -y apt-transport-https ca-certificates gnupg software-properties-common wget
           if [ $(lsb_release -sr) = "22.04" ]; then

.github/workflows/nightly.yml

@@ -530,8 +530,6 @@ jobs:
       - name: dependencies
         run: |
           apt update
-          # Workaround. Remove when https://discourse.ros.org/t/preparing-for-rolling-sync-delayed-by-python-3-10-transition/24521 solved
-          apt install -y python3.9-dev
           apt install -y python3-colcon-metadata python3-pip
           rosdep update --rosdistro $ROS_DISTRO
           rosdep install -y --from-paths src --ignore-src -y