Drop support for flask-restplus

flask-restx replaced flask-restplus. flask-restplus's latest version supports 3.6 which
we don't even support anymore.

newrelic/config.py

@@ -2162,11 +2162,6 @@ def _process_module_builtin_defaults():
     )
 
     _process_module_definition("flask_restful", "newrelic.hooks.component_flask_rest", "instrument_flask_rest")
-    _process_module_definition(
-        "flask_restplus.api",
-        "newrelic.hooks.component_flask_rest",
-        "instrument_flask_rest",
-    )
     _process_module_definition(
         "flask_restx.api",
         "newrelic.hooks.component_flask_rest",

tests/component_flask_rest/test_application.py

@@ -30,14 +30,12 @@
 TEST_APPLICATION_PREFIX = "_test_application.create_app.<locals>" if six.PY3 else "_test_application"
 
 
-@pytest.fixture(params=["flask_restful", "flask_restplus", "flask_restx"])
+@pytest.fixture(params=["flask_restful", "flask_restx"])
 def application(request):
     from _test_application import get_test_application
 
     if request.param == "flask_restful":
         import flask_restful as module
-    elif request.param == "flask_restplus":
-        import flask_restplus as module
     elif request.param == "flask_restx":
         import flask_restx as module
     else:

tox.ini

@@ -206,11 +206,10 @@ deps =
     component_djangorestframework-djangorestframework0300: djangorestframework < 3.1
     component_djangorestframework-djangorestframeworklatest: Django
     component_djangorestframework-djangorestframeworklatest: djangorestframework
-    component_flask_rest: flask<0.13
+    component_flask_rest: flask
     component_flask_rest: flask-restful
-    component_flask_rest: flask-restplus
-    component_flask_rest: jinja2<3.1
-    component_flask_rest: itsdangerous<2.1
+    component_flask_rest: jinja2
+    component_flask_rest: itsdangerous
     component_flask_rest-flaskrestxlatest: flask-restx
     component_flask_rest-flaskrestx051: flask-restx<1.0
     component_graphqlserver: graphql-server[sanic,flask]==3.0.0b5