banner: remove unused error message

res/core/messages.xml

@@ -4535,13 +4535,6 @@
       <arg name="command" type="order"/>
     </type>
   </message>
-  <message name="error125" section="errors">
-    <type>
-      <arg name="unit" type="unit"/>
-      <arg name="region" type="region"/>
-      <arg name="command" type="order"/>
-    </type>
-  </message>
   <message name="error84" section="errors">
     <type>
       <arg name="unit" type="unit"/>

res/translations/messages.de.po

@@ -692,9 +692,6 @@ msgstr "\"$unit($unit) in $region($region): '$order($command)' - Die Einheit kan
 msgid "error85"
 msgstr "\"$unit($unit) in $region($region): '$order($command)' - Es wurde keine Emailadresse angegeben.\""
 
-msgid "error125"
-msgstr "\"$unit($unit) in $region($region): '$order($command)' - Es wurde kein Banner angegeben.\""
-
 msgid "starvation"
 msgstr "\"$unit($unit) verliert in $region($region) $int($dead) von $int($add($live,$dead)) Personen durch Unterernährung.\""
 

res/translations/messages.en.po

@@ -692,9 +692,6 @@ msgstr "\"$unit($unit) in $region($region): '$order($command)' - The unit cannot
 msgid "error85"
 msgstr "\"$unit($unit) in $region($region): '$order($command)' - No email address was supplied.\""
 
-msgid "error125"
-msgstr "\"$unit($unit) in $region($region): '$order($command)' - No banner text was supplied.\""
-
 msgid "starvation"
 msgstr "\"$unit($unit) loses $int($dead) of $int($add($live,$dead)) people due to starvation in $region($region).\""