According to the hashmap interface specification sys_hashmap_remove will
"Erase the entry associated with key `key`, if one exists"
If a rehash is performed OA/LP will return 1 and no old_value for
sys_hashmap_insert.
If a rehash is NOT performed OA/LP will return 0 and a stale old_value for
sys_hashmap_insert even though the user requested the entry for that key to
be removed.
This patch makes OA/LP not return the value of tombstoned entries.
Signed-off-by: Emil Hammarstrom <emil.hammarstrom1@assaabloy.com>
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