updating DIRECTORY.md

Author: cclauss

DIRECTORY.md

@@ -582,9 +582,6 @@
   * [Geometry](geometry/geometry.py)
   * [Graham Scan](geometry/graham_scan.py)
   * [Jarvis March](geometry/jarvis_march.py)
-  * Tests
-    * [Test Graham Scan](geometry/tests/test_graham_scan.py)
-    * [Test Jarvis March](geometry/tests/test_jarvis_march.py)
   * [Monotone Chain](geometry/monotone_chain.py)
   * [Ramer Douglas Peucker](geometry/ramer_douglas_peucker.py)
   * [Rotating Calipers](geometry/rotating_calipers.py)