Get rid of the global python path extensions

sugar/__installed__.py.in

@@ -5,6 +5,4 @@ sugar_activity_info_dir = '@prefix@/share/sugar/activities'
 sugar_services_dir = '@prefix@/share/sugar/services'
 sugar_dbus_config = '@prefix@/share/sugar/dbus-installed.conf'
 
-sugar_python_path = ['@prefix@/share/sugar/activities']
-
 sugar_bin_path = []

sugar/__uninstalled__.py.in

@@ -10,9 +10,6 @@ sugar_activity_info_dir = __tmpdir
 
 sugar_dbus_config = os.path.join(sugar_source_dir, 'dbus-uninstalled.conf')
 
-sugar_python_path = []
-sugar_python_path.append(os.path.join(sugar_source_dir, 'activities'))
-
 sugar_bin_path = []
 sugar_bin_path.append(os.path.join(sugar_source_dir))
 sugar_bin_path.append(os.path.join(sugar_source_dir, 'shell'))

sugar/env.py

@@ -26,17 +26,7 @@ except ImportError:
 
 import sugar.setup
 
-def setup_python_path():
-	for path in sugar_python_path:
-		if os.environ.has_key('PYTHONPATH'):
-			old_path = os.environ['PYTHONPATH']
-			os.environ['PYTHONPATH'] = path + ':' + old_path 
-		else:
-			os.environ['PYTHONPATH'] = path
-
 def setup_system():
-	setup_python_path()
-
 	for path in sugar_bin_path:
 		if os.environ.has_key('PATH'):
 			old_path = os.environ['PATH']