Automatically delete Open Collective embeds

Keeps the channel neater

dictator/cogs/system.py

@@ -2,7 +2,7 @@
 from discord import app_commands
 from discord.ext import commands
 
-from constants import MOD_ROLE_ID
+from constants import MOD_ROLE_ID, OC_CHANNEL_ID
 from get_version import get_dictator_version
 
 import random
@@ -12,6 +12,17 @@ class System(commands.Cog):
     def __init__(self, dictator: commands.Bot) -> None:
         self.dictator = dictator
 
+    @commands.Cog.listener()
+    async def on_message(self, message: discord.Message):
+        if not message.channel.id == OC_CHANNEL_ID:
+            return
+
+        if not message.webhook_id:
+            return
+
+        if message.embeds:
+            await message.edit(suppress=True)
+
     @app_commands.command()
     async def ping(self, interaction: discord.Interaction) -> None:
         """Check the latency between Discord and Dictator."""