inserted [remove_item]x,y=$x1,$y1 where needed (bug #18522)

Using a local wmllint patch which I post only as an attachment in the bug.

data/campaigns/Dead_Water/scenarios/04_Slavers.cfg

@@ -631,6 +631,7 @@
         [/if]
 
         [remove_item]
+            x,y=$x1,$y1
         [/remove_item]
         [unit]
             type=Drake Burner
@@ -693,6 +694,7 @@
         [/filter]
 
         [remove_item]
+            x,y=$x1,$y1
         [/remove_item]
 
         [unit]

data/campaigns/Eastern_Invasion/scenarios/02_The_Escape_Tunnel.cfg

@@ -257,6 +257,7 @@
             amount=200
         [/gold]
         [remove_item]
+            x,y=$x1,$y1
         [/remove_item]
     [/event]
 

data/campaigns/Heir_To_The_Throne/scenarios/04_The_Bay_of_Pearls.cfg

@@ -310,6 +310,7 @@
         name=moveto
 
         [remove_item]
+            x,y=$x1,$y1
         [/remove_item]
 
         [filter]
@@ -386,6 +387,7 @@
     [event]
         name=moveto
         [remove_item]
+            x,y=$x1,$y1
         [/remove_item]
 
         [filter]
@@ -463,6 +465,7 @@
     [event]
         name=moveto
         [remove_item]
+            x,y=$x1,$y1
         [/remove_item]
 
         [filter]
@@ -512,6 +515,7 @@
     [event]
         name=moveto
         [remove_item]
+            x,y=$x1,$y1
         [/remove_item]
 
         [filter]
@@ -574,6 +578,7 @@
     [event]
         name=moveto
         [remove_item]
+            x,y=$x1,$y1
         [/remove_item]
 
         [filter]

data/campaigns/Heir_To_The_Throne/scenarios/14_Plunging_Into_the_Darkness.cfg

@@ -714,6 +714,7 @@
             amount=200
         [/gold]
         [remove_item]
+            x,y=$x1,$y1
         [/remove_item]
     [/event]
 

data/campaigns/Legend_of_Wesmere/scenarios/chapter2/05_The_Saurian_Treasury.cfg

@@ -291,6 +291,7 @@
             [then]
                 [remove_item]
                     image=items/chest.png
+                    x,y=$x1,$y1
                 [/remove_item]
                 [role]
                     x,y={POSITION}

data/campaigns/The_Rise_Of_Wesnoth/scenarios/19_The_Vanguard.cfg

@@ -352,6 +352,7 @@
         [/message]
 
         [remove_item]
+            x,y=$x1,$y1
         [/remove_item]
 
         {PLACE_IMAGE (items/chest-plain-open.png) $xx1 $yy1}