Yeah, that will do it.
To elaborate further, go into the Brest level folder (in ...
Battlefield 2\mods\fh2\levels), open the server.zip, go into
GameModes\sp3\64 and open the GamePlayObjects.con file.
You'll see this:
rem ********** Object Spawner **********
rem [ObjectSpawnerTemplate: Harbour_panzer4]
ObjectTemplate.create ObjectSpawner Harbour_panzer4
ObjectTemplate.activeSafe ObjectSpawner Harbour_panzer4
ObjectTemplate.modifiedByUser "Owner"
ObjectTemplate.isNotSaveable 1
ObjectTemplate.hasMobilePhysics 0
ObjectTemplate.setObjectTemplate 1 pzivh
ObjectTemplate.minSpawnDelay 130
ObjectTemplate.maxSpawnDelay 200
ObjectTemplate.teamOnVehicle 1
rem [ObjectSpawnerTemplate: Industry_sherman]
ObjectTemplate.create ObjectSpawner Industry_sherman
ObjectTemplate.activeSafe ObjectSpawner Industry_sherman
ObjectTemplate.modifiedByUser "Owner"
ObjectTemplate.isNotSaveable 1
ObjectTemplate.hasMobilePhysics 0
ObjectTemplate.setObjectTemplate 2 m4a1_76mm
ObjectTemplate.minSpawnDelay 100
ObjectTemplate.maxSpawnDelay 150
ObjectTemplate.teamOnVehicle 1
...
The 'm5a1_stuart' is a bit further down the list, just delete the yellow text and that'll get rid of your tanks.
If you want to change it in Coop as well, you'll need to do the same thing to the GPO file in
GameModes\gpm_coop\64.
