Allow Rome to build palisades.

Rome was unable to build palisades (presumably as it had unique access
to the somewhat comparable Siege Walls).
This however made Rome unable to build walls in Village Phase, and
restricting access to palisades makes little historical sense.

Patch by: Nescio
Accepted By: ValihrAnt, borg-, Lionkanzen
Differential Revision: https://code.wildfiregames.com/D2741
This was SVN commit r23839.

binaries/data/mods/public/simulation/templates/units/rome_champion_infantry_spear_gladiator.xml

@@ -5,7 +5,6 @@
   </Armour>
   <Builder>
     <Entities datatype="tokens">
-      -structures/wallset_palisade
       structures/rome_tower_artillery
       structures/rome_army_camp
       structures/rome_wallset_siege

binaries/data/mods/public/simulation/templates/units/rome_champion_infantry_sword_gladiator.xml

@@ -6,7 +6,6 @@
   </Armour>
   <Builder>
     <Entities datatype="tokens">
-      -structures/wallset_palisade
       structures/rome_tower_artillery
       structures/rome_army_camp
       structures/rome_wallset_siege

binaries/data/mods/public/simulation/templates/units/rome_infantry_javelinist_b.xml

@@ -2,7 +2,6 @@
 <Entity parent="template_unit_infantry_ranged_javelinist">
   <Builder>
     <Entities datatype="tokens">
-      -structures/wallset_palisade
       structures/rome_tower_artillery
       structures/rome_army_camp
       structures/rome_wallset_siege

binaries/data/mods/public/simulation/templates/units/rome_infantry_spearman_b.xml

@@ -2,7 +2,6 @@
 <Entity parent="template_unit_infantry_melee_spearman">
   <Builder>
     <Entities datatype="tokens">
-      -structures/wallset_palisade
       structures/rome_tower_artillery
       structures/rome_army_camp
       structures/rome_wallset_siege

binaries/data/mods/public/simulation/templates/units/rome_infantry_swordsman_b.xml

@@ -2,7 +2,6 @@
 <Entity parent="template_unit_infantry_melee_swordsman">
   <Builder>
     <Entities datatype="tokens">
-      -structures/wallset_palisade
       structures/rome_tower_artillery
       structures/rome_army_camp
       structures/rome_wallset_siege

binaries/data/mods/public/simulation/templates/units/rome_infantry_swordsman_slave.xml

@@ -2,7 +2,6 @@
 <Entity parent="template_unit_infantry_melee_swordsman">
   <Builder>
     <Entities datatype="tokens">
-      -structures/wallset_palisade
       structures/rome_tower_artillery
       structures/rome_army_camp
       structures/rome_wallset_siege