Removed legacy and improved documentation

cogs/data.py

@@ -35,6 +35,9 @@ class Data(commands.Cog):
         "kind", description="Тип даних, які треба експортувати", choices=["Користувачі"]
     )
     async def data_export_cmd(self, ctx: ApplicationContext, kind: str) -> None:
+        """Command /data export <kind>
+
+        Command to export specific kind of data."""
         await ctx.defer()
 
         # Return if the user is not an owner and not in the council
@@ -107,6 +110,11 @@ class Data(commands.Cog):
         "kind", description="Тип даних, які треба експортувати", choices=["Користувачі"]
     )
     async def data_migrate_cmd(self, ctx: ApplicationContext, kind: str) -> None:
+        """Command /migrate <kind>
+
+        Command to migrate specific kind of data.
+
+        Migration of users in this case means creation of their DB entries."""
         await ctx.defer()
 
         # Return if the user is not an owner and not in the council