python-codecs: remove erroneous libav from gstreamer settings

plugins/python-codecs/package-lock.json

@@ -1,12 +1,12 @@
 {
    "name": "@scrypted/python-codecs",
-   "version": "0.1.7",
+   "version": "0.1.8",
    "lockfileVersion": 3,
    "requires": true,
    "packages": {
       "": {
          "name": "@scrypted/python-codecs",
-         "version": "0.1.7",
+         "version": "0.1.8",
          "devDependencies": {
             "@scrypted/sdk": "file:../../sdk"
          }

plugins/python-codecs/package.json

@@ -1,6 +1,6 @@
 {
    "name": "@scrypted/python-codecs",
-   "version": "0.1.7",
+   "version": "0.1.8",
    "description": "Python Codecs for Scrypted",
    "keywords": [
       "scrypted",

plugins/python-codecs/src/main.py

@@ -38,7 +38,6 @@ class GstreamerGenerator(scrypted_sdk.ScryptedDeviceBase, scrypted_sdk.VideoFram
                 'value': self.storage.getItem('h264Decoder') or 'Default',
                 'choices': [
                     'Default',
-                    'libav',
                     'decodebin',
                     'vtdec_hw',
                     'nvh264dec',