feat(tts): made pylav check happen on message invocation instead of on cog load

tts/tts.py

@@ -8,7 +8,6 @@
 import logging
 
 from discord import Message
-from discord.ext import tasks
 from redbot.core import Config, commands
 from redbot.core.bot import Red
 
@@ -28,19 +27,9 @@ class TTS(commands.Cog):
             announce = False,
             voice_channels = True
         )
-        self.check_pylav.start()
-
-    @tasks.loop(seconds=5)
-    async def check_pylav(self):
-        await self.bot.wait_until_red_ready()
-        pylav = self.bot.get_cog("PyLavPlayer")
-        self.check_pylav.stop()
-        if pylav is None:
-            await self.bot.send_to_owners("You need to install PyLav to use the TTS cog.\nThe cog has been automatically unloaded.\nSee https://github.com/PyLav/Red-Cogs")
-            await self.bot.remove_cog("TTS")
-            raise RuntimeError("You need to install PyLav to use this cog. See https://github.com/PyLav/Red-Cogs")
 
     async def on_message(self, message: Message):
+        await self.bot.wait_until_red_ready()
         if message.author.bot:
             return
         if message.guild is None:
@@ -50,6 +39,11 @@ class TTS(commands.Cog):
         if any(message.content.startswith(prefix) for prefix in valid_prefixes):
             return
         if message.channel.id in await self.config.guild(message.guild).enabled_channels():
+            pylav = self.bot.get_cog("PyLavPlayer")
+            if pylav is None:
+                self.logger.error("PyLav is not loaded, so TTS is not available.")
+                await message.reply("PyLav is not loaded, so TTS is not available.\nPlease report this to the bot owner.\nIf you are the bot owner, see [https://github.com/PyLav/Red-Cogs](PyLav/RedCogs) for more information.")
+                return
             #TODO - add PyLav integration
             return