Tidy up CI configuration

Author: valeros

.github/workflows/examples.yml

@@ -55,13 +55,6 @@ jobs:
           - "examples/zephyr-net-https-client"
           - "examples/zephyr-subsys-usb-hid-mouse"
           - "tests/arduino-blink-different-cores"
-        exclude:
-          - {python-version: 2.7, example: "examples/zephyr-blink"}
-          - {python-version: 2.7, example: "examples/zephyr-cpp-synchronization"}
-          - {python-version: 2.7, example: "examples/zephyr-drivers-can"}
-          - {python-version: 2.7, example: "examples/zephyr-net-civetweb"}
-          - {python-version: 2.7, example: "examples/zephyr-net-https-client"}
-          - {python-version: 2.7, example: "examples/zephyr-subsys-usb-hid-mouse"}
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2