tests: Remove mesh SAE Password Identifier test cases for now

tests: Remove mesh SAE Password Identifier test cases for now

IEEE P802.11-REVmd was modified to require H2E to be used whenever
Password Identifier is used with SAE. Since wpa_supplicant and mac80211
do not yet support SAE H2E in mesh, Password Identifier cannot be used
in mesh cases. Remove the test cases that verified this behavior for now
to allow H2E to be required per updated REVmd definition. These test
cases will be restored once H2E is fully functionality in mesh cases.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>