Documentation/mm: drop pte_bad() descriptions from arch page table helpers

pte_bad() never existed unlike similar helpers at PMU, PUD, and PGD level.
This was added erroneously and hence should be dropped instead.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Anshuman Khandual <[email protected]>
Reviewed-by: Rick Edgecombe <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Andrew Morton <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: Anshuman Khandual

Documentation/mm/arch_pgtable_helpers.rst

@@ -18,8 +18,6 @@ PTE Page Table Helpers
 +---------------------------+--------------------------------------------------+
 | pte_same                  | Tests whether both PTE entries are the same      |
 +---------------------------+--------------------------------------------------+
-| pte_bad                   | Tests a non-table mapped PTE                     |
-+---------------------------+--------------------------------------------------+
 | pte_present               | Tests a valid mapped PTE                         |
 +---------------------------+--------------------------------------------------+
 | pte_young                 | Tests a young PTE                                |