Doom|Fixed: All texture animations are defined for all versions

Unlike the switches, all texture animations are present in all versions
of the game despite there being no graphics which use them in IWADs.

Consequently mod authors have made use of this as a means to insert
"new" animations in their mods.

doomsday/plugins/jdoom/src/p_spec.c

@@ -91,6 +91,7 @@ static void shootSpecialLine(mobj_t* thing, linedef_t* line);
 // These arrays are treated as a hardcoded replacements for data that can be
 // loaded from a lump, so we need to use little-endian byte ordering.
 static animdef_t animsShared[] = {
+    // Doom anims:
     {0, "BLOOD3",   "BLOOD1",   MACRO_LONG(8)},
     {0, "FWATER4",  "FWATER1",  MACRO_LONG(8)},
     {0, "SWATER4",  "SWATER1",  MACRO_LONG(8)},
@@ -106,10 +107,8 @@ static animdef_t animsShared[] = {
     {1, "SLADRIP3", "SLADRIP1", MACRO_LONG(8)},
     {1, "WFALL4",   "WFALL1",   MACRO_LONG(8)},
     {1, "BLODGR4",  "BLODGR1",  MACRO_LONG(8)},
-    {-1, "\0",      "\0"}
-};
 
-static animdef_t animsDoom2[] = {
+    // Doom 2 anims:
     {0, "RROCK08",  "RROCK05",  MACRO_LONG(8)},
     {0, "SLIME04",  "SLIME01",  MACRO_LONG(8)},
     {0, "SLIME08",  "SLIME05",  MACRO_LONG(8)},
@@ -248,8 +247,6 @@ void P_InitPicAnims(void)
 
     VERBOSE( Con_Message("Registering default texture animations...\n") );
     loadAnimDefs(animsShared, false);
-    if(gameModeBits & GM_ANY_DOOM2)
-        loadAnimDefs(animsDoom2, false);
 }
 
 boolean P_ActivateLine(linedef_t *ld, mobj_t *mo, int side, int actType)