Revert "Make fallen angel become assassin in all cases"

This change negatively impacts balance, assassin should in general never
be applied to any role the other team is required to kill in order to
win. Alpha wolf is the exception here, not the rule, since there is
counterplay involved with alpha biting GA (GA is likely immunized, can
guard self, game might end before turning, etc.) that simply does not
exist in other instances.

This reverts commit 3eb437fad6.

src/wolfgame.py

@@ -6053,8 +6053,6 @@ def transition_night(cli):
                             pm(cli, wolf, "\u0002{0}\u0002 is now a \u0002{1}\u0002!".format(amn, showrole))
                 elif amnrole == "turncoat":
                     var.TURNCOATS[amn] = ("none", -1)
-                if amnrole == "fallen angel":
-                    var.ROLES["assassin"].add(amn)
                 debuglog("{0} REMEMBER: {1} as {2}".format(amn, amnrole, showrole))
 
     if var.FIRST_NIGHT and chk_win(cli, end_game=False): # prevent game from ending as soon as it begins (useful for the random game mode)
@@ -6958,7 +6956,6 @@ def start(cli, nick, chan, forced = False, restart = ""):
         amnroles.discard(nope)
     for amnesiac in var.ROLES["amnesiac"]:
         var.AMNESIAC_ROLES[amnesiac] = random.choice(list(amnroles))
-    var.ROLES["assassin"].update(var.ROLES["fallen angel"])
 
     # Handle doctor
     for doctor in var.ROLES["doctor"]: