etc/pipewire: remove the ...example.donotuse

I am quite sure that the config file has changed so much that the file
wouldn't work anyway and I don't think I really need it with the
important part being in the README.md

etc/pipewire/media-session.d/alsa-monitor.conf.example.donotuse

@@ -1,65 +0,0 @@
-# alsa-monitor config file
-properties = {
-    #alsa.jack-device = true
-}
-
-rules = [
-    # an array of matches/actions to evaluate
-    {
-        # rules for matching a device or node. It is an array of
-        # properties that all need to match the regexp. If any of the
-        # matches work, the actions are executed for the object.
-        matches = [
-            {
-	        # this matches all cards
-                device.name = ~alsa_card.*
-            }
-        ]
-        actions = {
-            # actions can update properties on the matched object.
-            update-props = {
-                api.alsa.use-acp = 		true
-                #api.alsa.use-ucm = 		true
-                #api.alsa.soft-mixer = 		true
-                api.alsa.ignore-dB = 		true
-                #device.profile-set = 		"profileset-name"
-                #device.profile = 		"default profile name"
-                api.acp.auto-profile = 		false
-                api.acp.auto-port = 		false
-                #device.nick = 			"My Device"
-            }
-        }
-    }
-    {
-        matches = [
-            {
-	        # matches all sinks
-                node.name = ~alsa_input.*
-            }
-            {
-	        # matches all sources
-                node.name = ~alsa_output.*
-            }
-        ]
-        actions = {
-            update-props = {
-                #node.nick = 			"My Node"
-                #node.nick = 			null
-                #priority.driver = 		100
-                #priority.session = 		100
-                #node.pause-on-idle = 		false
-                #resample.quality = 		4
-                #channelmix.normalize =		false
-                #channelmix.mix-lfe = 		false
-                #audio.channels = 		2
-                #audio.format = 		"S16LE"
-                #audio.rate = 			44100
-                #audio.position = 		"FL,FR"
-                #api.alsa.period-size =         1024
-                #api.alsa.headroom =            0
-                #api.alsa.disable-mmap =        false
-                #api.alsa.disable-batch =       false
-            }
-        }
-    }
-]