🎨 Make __init__.py imports simpler

- Remove unnecessary comment about signals section
- Import jsonify in a single line

flask/__init__.py

@@ -29,20 +29,13 @@ from .ctx import has_request_context, has_app_context, \
      after_this_request, copy_current_request_context
 from .blueprints import Blueprint
 from .templating import render_template, render_template_string
-
-# the signals
 from .signals import signals_available, template_rendered, request_started, \
      request_finished, got_request_exception, request_tearing_down, \
      appcontext_tearing_down, appcontext_pushed, \
      appcontext_popped, message_flashed, before_render_template
 
-# We're not exposing the actual json module but a convenient wrapper around
-# it.
-from . import json
-
-# This was the only thing that Flask used to export at one point and it had
-# a more generic name.
-jsonify = json.jsonify
+# Expose a convenient wrapper around python's builtin json module.
+from .json import jsonify
 
 # backwards compat, goes away in 1.0
 from .sessions import SecureCookieSession as Session