remove python 2 support and unused packages from unit folder

Author: marcelmamula

README.md

@@ -73,15 +73,14 @@ Tested Ansible versions:
 - devel
 
 Tested Python versions:
-- 3.6
-- 3.7
-- 3.8
 - 3.9
 - 3.10
 - 3.11
 - 3.12
 - 3.13
 
+Support for Python 2 has been dropped. The minimum required Python version is 3.9.
+
 Due to SAP licensing and hardware requirements, integration tests are momentarily not feasible.
 The modules are tested manually against SAP systems until we found a solution or have some
 modules where we are able to execute integration test we decided to disable these tests.