docs: remove PTF test mention from basic README per maintainer feedback

Signed-off-by: An <aqnguyen96@gmail.com>

Author: aqn96

exercises/basic/README.md

@@ -189,21 +189,6 @@ make stop
 Congratulations, your implementation works! Move onto the next assignment
 [Basic Tunneling](../basic_tunnel)
 
-## Automated Tests
-
-PTF (Packet Test Framework) tests are available to verify the solution
-program works correctly. These tests run against `solution/basic.p4`
-and check forwarding behavior, including drop on miss, single entry
-forwarding, and multi-entry LPM routing.
-
-To run the tests:
-```bash
-make test
-```
-
-This handles veth interface creation, P4 compilation, switch startup,
-test execution, and cleanup automatically.
-
 ## Relevant Documentation
 
 The documentation for P4_16 and P4Runtime is available [here](https://p4.org/specifications/)