[Gameplay] Enable other civ's to train champions in Han barracks and stables

Reported by Player of 0AD:
https://wildfiregames.com/forum/topic/82754-alpha-26-pre-releaserelease-candidate-build-testing/page/16/#comment-514122

Note that this also deletes the Han swordsman templates, as they are
unused right now.

This was SVN commit r27046.

binaries/data/mods/public/simulation/templates/structures/han/barracks.xml

@@ -16,7 +16,6 @@
   </Obstruction>
   <Researcher>
     <Technologies datatype="tokens">
-      -unlock_champion_infantry
       archer_attack_spread
       crossbow_training
     </Technologies>
@@ -24,15 +23,6 @@
   <Trainer>
     <Entities datatype="tokens">
       units/{civ}/infantry_crossbowman_b
-      -units/{civ}/infantry_swordsman_b
-      -units/{civ}/champion_infantry_spearman
-      -units/{civ}/champion_infantry_pikeman
-      -units/{civ}/champion_infantry_maceman
-      -units/{civ}/champion_infantry_axeman
-      -units/{civ}/champion_infantry_swordsman
-      -units/{civ}/champion_infantry_javelineer
-      -units/{civ}/champion_infantry_slinger
-      -units/{civ}/champion_infantry_archer
     </Entities>
   </Trainer>
   <VisualActor>

binaries/data/mods/public/simulation/templates/structures/han/stable.xml

@@ -16,21 +16,10 @@
   </Obstruction>
   <Researcher>
     <Technologies datatype="tokens">
-      -unlock_champion_cavalry
       archer_attack_spread
       crossbow_training
     </Technologies>
   </Researcher>
-  <Trainer>
-    <BatchTimeModifier>0.8</BatchTimeModifier>
-    <Entities datatype="tokens">
-      -units/{civ}/champion_cavalry
-      -units/{civ}/champion_cavalry_spearman
-      -units/{civ}/champion_cavalry_archer
-      -units/{civ}/champion_chariot
-      -units/{civ}/war_dog
-    </Entities>
-  </Trainer>
   <VisualActor>
     <Actor>structures/han/stable.xml</Actor>
     <FoundationActor>structures/fndn_6x6.xml</FoundationActor>

binaries/data/mods/public/simulation/templates/units/han/infantry_swordsman_a.xml

@@ -1,12 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Entity parent="units/han/infantry_swordsman_b">
-  <Identity>
-    <Rank>Advanced</Rank>
-  </Identity>
-  <Promotion>
-    <Entity>units/han/infantry_swordsman_e</Entity>
-  </Promotion>
-  <VisualActor>
-    <Actor>units/han/infantry_swordsman_a.xml</Actor>
-  </VisualActor>
-</Entity>

binaries/data/mods/public/simulation/templates/units/han/infantry_swordsman_b.xml

@@ -1,21 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Entity parent="template_unit_infantry_melee_swordsman">
-  <Builder>
-    <Entities datatype="tokens">
-      -structures/wallset_palisade
-    </Entities>
-  </Builder>
-  <Identity>
-    <Civ>han</Civ>
-    <SelectionGroupName>units/han/infantry_swordsman_b</SelectionGroupName>
-    <SpecificName>Dāo Bīng</SpecificName>
-    <Icon>units/han/infantry_swordsman.png</Icon>
-    <RequiredTechnology>phase_town</RequiredTechnology>
-  </Identity>
-  <Promotion>
-    <Entity>units/han/infantry_swordsman_a</Entity>
-  </Promotion>
-  <VisualActor>
-    <Actor>units/han/infantry_swordsman_b.xml</Actor>
-  </VisualActor>
-</Entity>

binaries/data/mods/public/simulation/templates/units/han/infantry_swordsman_e.xml

@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Entity parent="units/han/infantry_swordsman_a">
-  <Identity>
-    <Rank>Elite</Rank>
-  </Identity>
-  <Promotion disable=""/>
-  <VisualActor>
-    <Actor>units/han/infantry_swordsman_e.xml</Actor>
-  </VisualActor>
-</Entity>