Commented out optional requirements that break RTD build

platypush/backend/midi.py

@@ -1,8 +1,6 @@
 import json
 import time
 
-import rtmidi
-
 from threading import Timer
 
 from platypush.backend import Backend
@@ -36,6 +34,7 @@ class MidiBackend(Backend):
         :type midi_throttle_time: int
         """
 
+        import rtmidi
         super().__init__(*args, **kwargs)
 
         if (device_name and port_number is not None) or \

requirements.txt

@@ -59,7 +59,7 @@ pylast
 # Video support on RaspberryPi: omxplayer system package
 
 # Custom hotword detection: Snowboy
-snowboy
+# snowboy
 
 # Support for the RaspberryPi camera module
 # apt install python3-picamera
@@ -71,8 +71,8 @@ snowboy
 pyscard
 
 # Support for MCP3008 analog-to-digital converter plugin
-adafruit-mcp3008
+# adafruit-mcp3008
 
 # Support for real-time MIDI events
-rtmidi
+# rtmidi