Remove some unused apps

The step counter app is special-cased in wasp.py. Remove that as well.

wasp/boards/manifest_240x240.py

@@ -12,8 +12,6 @@ manifest = (
     'apps/faces.py',
     'apps/fibonacci_clock.py',
     'apps/flashlight.py',
-    'apps/gallery.py',
-    'apps/haiku.py',
     'apps/heart.py',
     'apps/musicplayer.py',
     'apps/launcher.py',
@@ -21,11 +19,8 @@ manifest = (
     'apps/play2048.py',
     'apps/settings.py',
     'apps/software.py',
-    'apps/sports.py',
-    'apps/steps.py',
     'apps/stopwatch.py',
     'apps/snake.py',
-    'apps/testapp.py',
     'apps/timer.py',
     'apps/weather.py',
     'apps/week_clock.py',

wasp/wasp.py

@@ -24,7 +24,6 @@ import widgets
 
 from apps.launcher import LauncherApp
 from apps.pager import PagerApp, CrashApp, NotificationApp
-from apps.steps import StepCounterApp
 
 RAISE_WAKE_Y_SWITCH_THRESHOLD = -1536
 RAISE_WAKE_SPEED_MODIFIER = 8
@@ -207,12 +206,6 @@ class Manager():
             if not app:
                 return
 
-        # "Special case" for watches that have working step counters!
-        # More usefully it allows other apps to detect the presence/absence
-        # of a working step counter by looking at wasp.system.steps .
-        if isinstance(app, StepCounterApp):
-            self.steps = steplogger.StepLogger(self)
-
         if watch_face:
             self.quick_ring[0] = app
         elif quick_ring: