Fed Training requirements update

src/participation-hub/federated-learning-microservice/app/requirements.txt

+tensorflow==2.3.0
+tensorflow-federated==0.17.0
+pandas==1.2.4
 astroid==2.4.2
 attrs==19.3.0
 autopep8==1.5.4
@@ -22,7 +25,6 @@ lazy-object-proxy==1.4.3
 MarkupSafe==1.1.1
 mccabe==0.6.1
 openapi-spec-validator==0.2.9
-pandas==1.2.4
 prance==0.19.0
 pycodestyle==2.6.0
 pycparser==2.20
@@ -35,8 +37,6 @@ rope==0.17.0
 semver==2.10.2
 six==1.15.0
 swagger-ui-bundle==0.0.8
-tensorflow==2.3.0
-tensorflow-federated==0.17.0
 toml==0.10.1
 typed-ast==1.4.1
 urllib3==1.25.10