STYLE: cleanup handling of 0.org directories (in parallel)

- remove duplicate 0/ files from the repository

tutorials/multiphase/interPhaseChangeFoam/cavitatingBullet/Allclean

@@ -7,8 +7,8 @@ cd ${0%/*} || exit 1    # Run from this directory
 # Remove surface
 \rm -f constant/triSurface/bullet.stl.gz
 
-# Remove copy of 0.org
-rm -rf 0
+# Remove 0.org/ copy
+\rm -rf 0
 
 cleanCase