ZTS: remove empty zpool_add--allow-ashift-mismatch test

Added in b1e46f8, but empty, so no point keeping it around.

Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: George Melikov <[email protected]>
Signed-off-by: Rob Norris <[email protected]>
Closes #16931

Author: robn

tests/runfiles/common.run

@@ -387,8 +387,7 @@ tags = ['functional', 'cli_root', 'zpool']
 tests = ['zpool_add_001_pos', 'zpool_add_002_pos', 'zpool_add_003_pos',
     'zpool_add_004_pos', 'zpool_add_006_pos', 'zpool_add_007_neg',
     'zpool_add_008_neg', 'zpool_add_009_neg', 'zpool_add_010_pos',
-    'add-o_ashift', 'add_prop_ashift', 'zpool_add_dryrun_output',
-    'zpool_add--allow-ashift-mismatch']
+    'add-o_ashift', 'add_prop_ashift', 'zpool_add_dryrun_output']
 tags = ['functional', 'cli_root', 'zpool_add']
 
 [tests/functional/cli_root/zpool_attach]

tests/zfs-tests/tests/Makefile.am

@@ -998,7 +998,6 @@ nobase_dist_datadir_zfs_tests_tests_SCRIPTS += \
 	functional/cli_root/zpool_add/add_prop_ashift.ksh \
 	functional/cli_root/zpool_add/cleanup.ksh \
 	functional/cli_root/zpool_add/setup.ksh \
-	functional/cli_root/zpool_add/zpool_add--allow-ashift-mismatch.ksh \
 	functional/cli_root/zpool_add/zpool_add_001_pos.ksh \
 	functional/cli_root/zpool_add/zpool_add_002_pos.ksh \
 	functional/cli_root/zpool_add/zpool_add_003_pos.ksh \