Lua AIs: remove unused library inclusions after distance_between change

Follow-up to 6efc5ae090

data/ai/micro_ais/cas/ca_bottleneck_attack.lua

@@ -1,5 +1,4 @@
 local AH = wesnoth.require "ai/lua/ai_helper.lua"
-local H = wesnoth.require "helper"
 
 local ca_bottleneck_attack = {}
 

data/ai/micro_ais/cas/ca_fast_move.lua

@@ -1,4 +1,3 @@
-local H = wesnoth.require "helper"
 local AH = wesnoth.require "ai/lua/ai_helper.lua"
 local FAU = wesnoth.require "ai/micro_ais/cas/ca_fast_attack_utils.lua"
 local M = wesnoth.map

data/ai/micro_ais/cas/ca_forest_animals_tusker_attack.lua

@@ -1,4 +1,3 @@
-local H = wesnoth.require "helper"
 local AH = wesnoth.require "ai/lua/ai_helper.lua"
 local M = wesnoth.map
 

data/ai/micro_ais/cas/ca_forest_animals_tusklet_move.lua

@@ -1,4 +1,3 @@
-local H = wesnoth.require "helper"
 local AH = wesnoth.require "ai/lua/ai_helper.lua"
 local M = wesnoth.map
 

data/ai/micro_ais/cas/ca_healer_may_attack.lua

@@ -1,5 +1,3 @@
-local H = wesnoth.require "helper"
-
 local ca_healer_may_attack = {}
 
 function ca_healer_may_attack:evaluation()

data/ai/micro_ais/cas/ca_messenger_move.lua

@@ -1,4 +1,3 @@
-local H = wesnoth.require "helper"
 local AH = wesnoth.require "ai/lua/ai_helper.lua"
 
 local messenger_next_waypoint = wesnoth.require "ai/micro_ais/cas/ca_messenger_f_next_waypoint.lua"

data/ai/micro_ais/cas/ca_swarm_move.lua

@@ -1,4 +1,3 @@
-local H = wesnoth.require "helper"
 local AH = wesnoth.require "ai/lua/ai_helper.lua"
 local M = wesnoth.map
 

data/ai/micro_ais/cas/ca_swarm_scatter.lua

@@ -1,4 +1,3 @@
-local H = wesnoth.require "helper"
 local AH = wesnoth.require "ai/lua/ai_helper.lua"
 local M = wesnoth.map
 

data/ai/micro_ais/cas/ca_wolves_multipacks_wander.lua

@@ -1,4 +1,3 @@
-local H = wesnoth.require "helper"
 local AH = wesnoth.require "ai/lua/ai_helper.lua"
 local MAIUV = wesnoth.require "ai/micro_ais/micro_ai_unit_variables.lua"
 local LS = wesnoth.require "location_set"

data/campaigns/Eastern_Invasion/ai/ca_ogres_flee.lua

@@ -1,4 +1,3 @@
-local H = wesnoth.require "helper"
 local AH = wesnoth.require "ai/lua/ai_helper.lua"
 local BC = wesnoth.require "ai/lua/battle_calcs.lua"
 --local LS = wesnoth.require "location_set"