Remove spammy invitation accepted webhook notifications

src/webhooks.py

@@ -246,22 +246,6 @@ async def organization_member_invited(self, payload: ClientPayload):
             f"{name} invited {invited} to {org} in the following teams: {{{teams}}}",
         )
 
-    @Server.route()
-    async def organization_member_added(self, payload: ClientPayload):
-        gh = payload.github_data
-        # Send a message to software-leadership in the form of:
-        # [User A](link) accepted an invitation to join [organization_name](link)
-        name = (
-            f"[{await self.real_name(gh['membership']['user']['login'])}]({self.url(gh['membership']['user'], html=True)})"
-            if "user" in gh["membership"]
-            else gh["membership"]["email"]
-        )
-        org = f"[{gh['organization']['login']}]({self.url(gh['organization'])})"
-        updates_channel = self.leaders_channel(gh["organization"]["login"])
-        await updates_channel.send(
-            f"{name} accepted an invitation to join {org}",
-        )
-
     @Server.route()
     async def organization_member_removed(self, payload: ClientPayload):
         gh = payload.github_data