Add ability to remove vo,ume hook. (#79)

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "roonapi"
-version = "0.1.4"
+version = "0.1.5"
 description = "Provides a python interface to interact with Roon"
 authors = [
     "Greg Dowling <[email protected]>"

roonapi/roonapi.py

@@ -1037,6 +1037,24 @@ def register_volume_control(
             data = {"controls_added": [control_data]}
             self._roonsocket.send_continue(self._volume_controls_request_id, data)
 
+    def unregister_volume_control(
+        self,
+        control_key,
+    ):
+        """Delete a new volume control on the api."""
+
+        if control_key not in self._volume_controls:
+            LOGGER.error("source_control %s is not registered!" % control_key)
+            return
+        control_data = {
+            "control_key": control_key,
+        }
+        del self._volume_controls[control_key]
+
+        if self._volume_controls_request_id:
+            data = {"controls_removed": [control_data]}
+            self._roonsocket.send_continue(self._volume_controls_request_id, data)
+
     def update_volume_control(self, control_key, volume=None, mute=None):
         """Update an existing volume control, report its state to Roon."""
         if control_key not in self._volume_controls: