Remove door terrains that were supposed to be removed by 1.14

If someone was using these despite being hidden and everything they were
really asking to get shot in the foot at some point.

(cherry-picked from commit 6eddc6f978)

changelog.md

@@ -70,6 +70,9 @@
    * Fixed various instances of the server crashing under certain conditions.
  ### Packaging
    * OpenMP support has been removed. It is no longer an optional build-time dependency.
+ ### Terrains
+   * Removed hidden terrains that were not supposed to make it to 1.14: ^Prg,
+     ^Prgo, ^Pwd, ^Pwdo
  ### Units
    * Changed the plural name for the merfolk race from Mermen to Merfolk (issue #2940)
      and replaced a few instances in core unit or terrain descriptions accordingly.

data/core/terrain-graphics.cfg

@@ -433,12 +433,6 @@ C*,K*,X*,Q*,W*,Ai,M*,*^V*,*^B*,_off^_usr#enddef
 {GATES_DIAGONAL_SW_L 		(*^Pw\o)	(X*)	0 	() 	portals/door-wooden-open}
 {GATES_DIAGONAL_SE_L 		(*^Pw/o)	(X*)	0 	() 	portals/door-wooden-open}
 
-# Simple dummy tiles for obsolete terrain codes
-{NEW:OVERLAY (*^Prg) portals/gate-rusty-long-n}
-{NEW:OVERLAY (*^Prgo) portals/gate-rusty-open-long-n}
-{NEW:OVERLAY (*^Pwd) portals/door-wooden-long-n}
-{NEW:OVERLAY (*^Pwdo) portals/door-wooden-open-long-n}
-
 
 #
 #       >  B A S E   T E R R A I N S  <

data/core/terrain.cfg

@@ -1400,69 +1400,6 @@ Occasionally caves are <ref>dst='terrain_illuminated_cave' text='illuminated'</r
     hide_help=yes
 [/terrain_type]
 
-#
-#    ## Previous directionless gate terrains (for backwards compatibility) ##
-#    ## Should be removed by BfW 1.14.0
-#
-
-[terrain_type]
-    symbol_image=void/void
-    editor_image=portals/gate-rusty-long-se
-    id=portal_gate_rusty
-    name= _ "Gate"
-    editor_name= _ "Rusty Gate"
-    string=^Prg
-    default_base=Rr
-    aliasof=_bas,Xt
-    mvt_alias=Xt
-    editor_group=embellishments,obstacle
-    hidden=yes
-    hide_help=yes
-[/terrain_type]
-
-[terrain_type]
-    symbol_image=void/void
-    editor_image=portals/door-wooden-long-se
-    id=portal_door_wooden
-    name= _ "Door"
-    editor_name= _ "Wooden Door"
-    string=^Pwd
-    default_base=Rr
-    aliasof=_bas,Xt
-    mvt_alias=Xt
-    editor_group=embellishments,obstacle
-    hidden=yes
-    hide_help=yes
-[/terrain_type]
-
-[terrain_type]
-    symbol_image=void/void
-    editor_image=portals/gate-rusty-open-long-se
-    id=p_open_rusty
-    name= _ "Gate"
-    editor_name= _ "Rusty Open Gate"
-    string=^Prgo
-    default_base=Rr
-    aliasof=_bas
-    editor_group=embellishments
-    hidden=yes
-    hide_help=yes
-[/terrain_type]
-
-[terrain_type]
-    symbol_image=void/void
-    editor_image=portals/door-wooden-open-long-se
-    id=p_open_wooden
-    name= _ "Door"
-    editor_name= _ "Wooden Open Door"
-    string=^Pwdo
-    default_base=Rr
-    aliasof=_bas
-    editor_group=embellishments
-    hidden=yes
-    hide_help=yes
-[/terrain_type]
-
 #
 #    ## Invisible obstacle overlays ##
 #