Remove PDP test section from index

Change-Id: I0ce9f2ed9a1f182d30a24f47e19c89859d87f577
diff --git a/index.rst b/index.rst
index 4aaff92..e3a2307 100644
--- a/index.rst
+++ b/index.rst
@@ -52,7 +52,6 @@
    :glob:
 
    testing/about_system_tests
-   testing/pdp_testing
    testing/fabric_testing
    testing/sdcore_testing
    testing/aether-roc-api-tests