Revert "pipewire: Add configuration for UMC202HD"

This reverts commit 5462768f19.

The new pipewire version from 23.05 automatically separates the inputs.

modules/pipewire.nix

@@ -23,47 +23,4 @@ lib.mkIf config.sbruder.gui.enable {
 
   hardware.bluetooth.enable = lib.mkDefault bluetoothSupport;
   services.blueman.enable = lib.mkDefault bluetoothSupport;
-
-  environment.etc."pipewire/pipewire.conf.d/10-behringer-umc202hd.conf".text = ''
-    # This is heavily based on the example from the PipeWire wiki:
-    # https://gitlab.freedesktop.org/pipewire/pipewire/-/wikis/Virtual-Devices#behringer-umc404hd-microphoneguitar-virtual-sources
-    # It has the problem that the virtual source persists,
-    # even when the physical source is disconnected.
-    context.modules = [
-        {   name = libpipewire-module-loopback
-            args = {
-                node.description = "UMC202HD Left"
-                capture.props = {
-                    node.name = "capture.UMC202HD_Left"
-                    audio.position = [ FL ]
-                    stream.dont-remix = true
-                    target.object = "alsa_input.usb-BEHRINGER_UMC202HD_192k_12345678-00.analog-stereo"
-                    node.passive = true
-                }
-                playback.props = {
-                    node.name = "UMC202HD_Left"
-                    media.class = "Audio/Source"
-                    audio.position = [ MONO ]
-                }
-            }
-        }
-        {   name = libpipewire-module-loopback
-            args = {
-                node.description = "UMC202HD Right"
-                capture.props = {
-                    node.name = "capture.UMC202HD_Right"
-                    audio.position = [ FR ]
-                    stream.dont-remix = true
-                    target.object = "alsa_input.usb-BEHRINGER_UMC202HD_192k_12345678-00.analog-stereo"
-                    node.passive = true
-                }
-                playback.props = {
-                    node.name = "UMC202HD_Right"
-                    media.class = "Audio/Source"
-                    audio.position = [ MONO ]
-                }
-            }
-        }
-    ]
-  '';
 }