merge singularity and duality into one; under the singularity name

Bosses.py

@@ -238,21 +238,15 @@ def place_bosses(world, player: int):
                 place_boss(world, player, boss, loc, level)
 
     elif world.boss_shuffle[player] == "singularity":
-        boss = world.random.choice(anywhere_bosses)
-        for loc, level in boss_locations:
-            place_boss(world, player, boss, loc, level)
-
-    elif world.boss_shuffle[player] == "duality":
-        # pick a boss that can only appear in some places
-        limited_boss = world.random.choice([boss for boss in placeable_bosses if boss not in anywhere_bosses])
-
+        primary_boss = world.random.choice(placeable_bosses)
         remaining_boss_locations = []
         for loc, level in boss_locations:
             # place that boss where it can go
-            if can_place_boss(world, player, limited_boss, loc, level):
-                place_boss(world, player, limited_boss, loc, level)
+            if can_place_boss(world, player, primary_boss, loc, level):
+                place_boss(world, player, primary_boss, loc, level)
             else:
                 remaining_boss_locations.append((loc, level))
+        if remaining_boss_locations:
             # pick a boss to go into the remaining locations
             remaining_boss = world.random.choice([boss for boss in placeable_bosses if all(
                 can_place_boss(world, player, boss, loc, level) for loc, level in remaining_boss_locations)])

EntranceRandomizer.py

@@ -292,7 +292,7 @@ def parse_arguments(argv, no_defaults=False):
     parser.add_argument('--skip_playthrough', action='store_true', default=defval(False))
     parser.add_argument('--enemizercli', default=defval('EnemizerCLI/EnemizerCLI.Core'))
     parser.add_argument('--shufflebosses', default=defval('none'), choices=['none', 'basic', 'normal', 'chaos',
-                                                                            "singularity", "duality"])
+                                                                            "singularity"])
     parser.add_argument('--shuffleenemies', default=defval('none'),
                         choices=['none', 'shuffled', 'chaos', 'chaosthieves'])
     parser.add_argument('--enemy_health', default=defval('default'),

Gui.py

@@ -385,7 +385,7 @@ def guiMain(args=None):
     enemizerBossVar = StringVar()
     enemizerBossVar.set('none')
     enemizerBossOption = OptionMenu(enemizerBossFrame, enemizerBossVar, 'none', 'basic', 'normal', 'chaos',
-                                    "singularity", "duality")
+                                    "singularity")
     enemizerBossOption.pack(side=LEFT)
 
     enemizerDamageFrame = Frame(enemizerFrame)

Mystery.py

@@ -331,7 +331,7 @@ def roll_settings(weights):
                          'full': 'normal',
                          'random': 'chaos',
                          'singularity': 'singularity',
-                         'duality': 'duality'
+                         'duality': 'singularity'
                          }[get_choice('boss_shuffle', weights)]
 
     ret.shuffleenemies = {'none': 'none',