build: drop py39 openai agents envs

Author: nagkumar91

tox.ini

@@ -14,8 +14,7 @@ envlist =
     lint-instrumentation-openai-v2
 
     ; instrumentation-openai-agents
-    py3{9,10,11,12,13}-test-instrumentation-openai_agents-v2-{oldest,latest}
-    pypy3-test-instrumentation-openai_agents-v2-{oldest,latest}
+    py3{10,11,12,13}-test-instrumentation-openai_agents-v2-{oldest,latest}
     lint-instrumentation-openai_agents-v2
 
     ; instrumentation-vertexai