clean up import order, fix small error in doc example

docs/source/usage.rst

@@ -373,7 +373,7 @@ OGC API - Connected Systems -  Part 1: Feature Resources & Part 2: Dynamic Data
 
 .. code-block:: python
 
- >>> from owslib.ogcapi.connectedsystems import {Systems, Datastreams, Observations}
+ >>> from owslib.ogcapi.connectedsystems import Systems, Datastreams, Observations
  >>> s = Systems('http://localhost:5000', auth=('user', 'password'), headers={'Content-Type': 'application/sml+json'})
  >>> ds = Datastreams('http://localhost:5000', auth=('user', 'password'), headers={'Content-Type': 'application/json'})
  >>> obs = Observations('http://localhost:5000', auth=('user', 'password'), headers={'Content-Type': 'application/json'})

owslib/ogcapi/connectedsystems.py

@@ -7,9 +7,7 @@
 # ==============================================================================
 import logging
 
-import requests
-
-from owslib.ogcapi import Collections, API
+from owslib.ogcapi import API, Collections
 from owslib.util import (Authentication)
 
 LOGGER = logging.getLogger(__name__)

tests/test_ogcapi_connectedsystems_osh.py

@@ -6,11 +6,11 @@
 #  Contact email: [email protected]
 # ==============================================================================
 
-import json
 from datetime import datetime
+import json
 
-from owslib.ogcapi.connectedsystems import Systems, Deployments, Datastreams, Observations, ControlChannels, Commands, \
-    SystemEvents, SystemHistory, SamplingFeatures, Properties
+from owslib.ogcapi.connectedsystems import Commands, ControlChannels, Datastreams, Deployments, Observations, \
+    Properties, SamplingFeatures, SystemEvents, SystemHistory, Systems
 from owslib.util import Authentication