[Gameplay] Han - remove Laozi gate

It is not historically correct and more importantly, I also doesn't add
that much gamplay value. Also clean up the template a bit and remove the
aura while at it.

accepted by : @Stan & people on the forum:
https://wildfiregames.com/forum/topic/83323-balancing-the-han-release-candidate-1/

Differential revision: https://code.wildfiregames.com/D4708
This was SVN commit r26975.

binaries/data/mods/public/simulation/data/auras/structures/han_laozi_gate.json

@@ -1,12 +0,0 @@
-{
-	"type": "range",
-	"radius": 75,
-	"affects": ["Human"],
-	"modifications": [
-		{ "value": "Health/RegenRate", "add": 1 },
-		{ "value": "Health/Max", "multiply": 1.25 }
-	],
-	"auraName": "Taoism",
-	"auraDescription": "Humans +1 health regeneration rate, +25% health",
-	"overlayIcon": "art/textures/ui/session/auras/health_bonus.png"
-}

binaries/data/mods/public/simulation/templates/mixins/builder.xml

@@ -21,7 +21,6 @@
       structures/{civ}/forge
       structures/{civ}/temple
       structures/{civ}/market
-      structures/{civ}/laozigate
       structures/{civ}/outpost
       structures/{civ}/sentry_tower
       structures/{civ}/defense_tower

binaries/data/mods/public/simulation/templates/special/players/han.xml

@@ -8,7 +8,6 @@
       <GreatTower>1</GreatTower>
       <ImperialMinistry>1</ImperialMinistry>
       <ImperialCourt>1</ImperialCourt>
-      <LaoziGate>4</LaoziGate>
       <Minister>9</Minister>
     </Limits>
   </EntityLimits>

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

@@ -1,15 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Entity parent="template_structure">
-  <Auras datatype="tokens">
-    structures/han_laozi_gate
-  </Auras>
-  <BuildRestrictions>
-    <Category>LaoziGate</Category>
-    <Distance>
-      <FromClass>LaoziGate</FromClass>
-      <MinDistance>50</MinDistance>
-    </Distance>
-  </BuildRestrictions>
   <Capturable disable=""/>
   <Cost>
     <BuildTime>120</BuildTime>