THoT S12: eliminate some variables

We don't need these state tracking variables, since they only filter for event conditionals,
which first_time_only does automatically anyway

data/campaigns/The_Hammer_of_Thursagan/scenarios/12_The_Underlevels.cfg

@@ -353,7 +353,6 @@
         name=prestart
 
         {VARIABLE key_read      no}
-        {VARIABLE liches_active no}
 
         {VARIABLE rune_dst_12 37}
         {VARIABLE rune_dst_20 41}
@@ -502,12 +501,6 @@
     # This event handles the actual lich activation
     [event]
         name=activate_liches
-        [filter_condition]
-            [variable]
-                name=liches_active
-                boolean_equals=no
-            [/variable]
-        [/filter_condition]
 
         [message]
             speaker=Angarthing
@@ -518,8 +511,6 @@
             side=6,7
             amount={ON_DIFFICULTY 200 250 300}
         [/gold]
-
-        {VARIABLE liches_active yes}
     [/event]
 
     # We're at the door to the sealed cave section.
@@ -810,12 +801,6 @@
     # This event deals with the dialog for freeing someone
     [event]
         name=jail_saga
-        [filter_condition]
-            [variable]
-                name=saga_told
-                boolean_equals=no
-            [/variable]
-        [/filter_condition]
 
         [message]
             speaker=unit
@@ -841,8 +826,6 @@
             speaker=Angarthing
             message= _ "Freeing these prisoners is more of a blow to Karrag than we thought, for now he is unable to continue his foul sorcery."
         [/message]
-
-        {VARIABLE saga_told yes}
     [/event]
 
     [event]