Add unused private field warning

Co-authored-by: Jesús Poderoso <120394830+JesusPoderoso@users.noreply.github.com>
Signed-off-by: Raul Sanchez-Mateos Lizano <raul@eprosima.com>

Author: 2 people

.github/workflows/reusable-ubuntu-ci.yml

@@ -60,7 +60,7 @@ on:
 
 env:
   security-cmake-flag: ${{ inputs.security == true && '-DSECURITY=ON' || '-DSECURITY=OFF' }}
-  colcon-build-default-cmake-args: '-DCMAKE_CXX_FLAGS="-Werror -Wall -Wextra -Wpedantic -Wunused-value -Woverloaded-virtual -Wsign-compare -Wcast-align -Wlogical-op -Wduplicated-cond -Wrestrict -Wnull-dereference -Wpointer-arith -Wwrite-strings -Wunreachable-code"'
+  colcon-build-default-cmake-args: '-DCMAKE_CXX_FLAGS="-Werror -Wall -Wextra -Wpedantic -Wunused-value -Woverloaded-virtual -Wsign-compare -Wcast-align -Wlogical-op -Wduplicated-cond -Wrestrict -Wnull-dereference -Wpointer-arith -Wwrite-strings -Wunreachable-code -Wunused-private-field"'
 defaults:
   run:
     shell: bash