In doc_core_tsconfig, Page TSconfig, section Web>List (mod.web_list):
Create a new property after "allowedNewTables":
* Property: deniedNewTables
* Data type: list of tablenames
* Description: If this list is set, then the tables listed here won't
have a link to "create news" in the page and subpages.
This also affects "db_new.php" (the display of "Create new record").
This is the oposite of the previous property "allowedNewTables".
If allowedNewTables and deniedNewTables contain a common subset,
deniedNewTables takes precedence.
Example:
mod.web_list {
  deniedNewTables = tt_news,tt_content
}