selfcheck.yml: enabled UNUSEDFUNCTION_ONLY hack

Author: firewave

.github/workflows/selfcheck.yml

@@ -63,6 +63,7 @@ jobs:
           ./cppcheck -q --template=selfcheck --error-exitcode=1 --library=cppcheck-lib --library=qt -D__CPPCHECK__ -D__GNUC__ -DQT_VERSION=0x050000 -DQ_MOC_OUTPUT_REVISION=67 --enable=unusedFunction --exception-handling -rp=. --project=cmake.output/compile_commands.json --suppressions-list=.selfcheck_unused_suppressions --inline-suppr
         env:
           DISABLE_VALUEFLOW: 1
+          UNUSEDFUNCTION_ONLY: 1
 
       # the following steps are duplicated from above since setting up the build node in a parallel step takes longer than the actual steps
       - name: CMake (no test)
@@ -83,3 +84,4 @@ jobs:
           ./cppcheck -q --template=selfcheck --error-exitcode=1 --library=cppcheck-lib --library=qt -D__CPPCHECK__ -D__GNUC__ -DQT_VERSION=0x050000 -DQ_MOC_OUTPUT_REVISION=67 --enable=unusedFunction --exception-handling -rp=. --project=cmake.output.notest/compile_commands.json --suppressions-list=.selfcheck_unused_suppressions --inline-suppr
         env:
           DISABLE_VALUEFLOW: 1
+          UNUSEDFUNCTION_ONLY: 1