Fix issues with hero deaths in EI S03 (#9595)

Avoid adding duplicate "last breath" events (HERODEATH macros), and don't call [endlevel] in "die" event ( as it's already called in "last_breath").

data/campaigns/Eastern_Invasion/scenarios/03_An_Unexpected_Appearance.cfg

@@ -321,9 +321,6 @@
             #po: star wars reference
             message= _ "We will watch your career with great interest..."
         [/message]
-        [endlevel]
-            result=defeat
-        [/endlevel]
     [/event]
     [event]
         name=last breath
@@ -335,10 +332,6 @@
             speaker=Mal-Tar
             message= _ "Wait, please, not like this!"
         [/message]
-
-        # add in the herodeaths. Don't do these before, since we want special behavior for the achievement
-        {HERODEATH_GWEDDRY}
-        {HERODEATH_DACYN}
     [/event]
     [event]
         name=die