ci: Remove old condition

This condition was when we had Ubuntu 18.04 and added 20.04. When we
dropped 18.04, and moved to 20.04+22.04, this condition should've been
enabled everywhere.

Author: QuLogic

.github/workflows/tests.yml

@@ -286,11 +286,7 @@ jobs:
           # Set flag in a delayed manner to avoid issues with installing other
           # packages
           if [[ "${{ runner.os }}" != 'macOS' ]]; then
-            if [[ "$(lsb_release -r -s)" == "20.04" ]]; then
-              export CPPFLAGS='--coverage -fprofile-abs-path'
-            else
-              export CPPFLAGS='--coverage'
-            fi
+            export CPPFLAGS='--coverage -fprofile-abs-path'
           fi
 
           python -m pip install --no-deps --no-build-isolation --verbose \