diff --git a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/04.reference-frames-coordinate-systems/coordinates-systems/cylindrical/.gitkeep b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/04.reference-frames-coordinate-systems/coordinates-systems/cylindrical/.gitkeep deleted file mode 100644 index e69de29bb..000000000