Remove tools/code_check and update codecov

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
         id: ci
         uses: ignition-tooling/action-ignition-ci@bionic
         with:
-          codecov-token: ${{ secrets.CODECOV_TOKEN }}
+          codecov-enabled: true
   focal-ci:
     runs-on: ubuntu-latest
     name: Ubuntu Focal CI

CMakeLists.txt

@@ -9,7 +9,7 @@ project(ignition-gazebo3 VERSION 3.8.0)
 # Find ignition-cmake
 #============================================================================
 # If you get an error at this line, you need to install ignition-cmake
-find_package(ignition-cmake2 2.3 REQUIRED)
+find_package(ignition-cmake2 2.8.0 REQUIRED)
 
 #============================================================================
 # Configure the project