code: public <T extends Permissionable & DiscordEntity> ServerChannelUpdater removePermissionOverwrite(T permissionable) {
          delegate.removePermissionOverwrite(permissionable);
          return this;
      }
docs: Removes a permission overwrite for the given entity.
  
  @param <T> The type of entity to hold the permission, usually <code>User</code> or <code>Role</code>
  @param permissionable The entity which permission overwrite should be removed.
  @return The current instance in order to chain call methods.