remove advancedforeword

docs/advanced_foreword.rst

@@ -1,46 +0,0 @@
-Foreword for Experienced Programmers
-====================================
-
-Thread-Locals in Flask
-----------------------
-
-One of the design decisions in Flask was that simple tasks should be simple;
-they should not take a lot of code and yet they should not limit you. Because
-of that, Flask has a few design choices that some people might find
-surprising or unorthodox. For example, Flask uses thread-local objects
-internally so that you don’t have to pass objects around from
-function to function within a request in order to stay threadsafe.
-This approach is convenient, but requires a valid
-request context for dependency injection or when attempting to reuse code which
-uses a value pegged to the request.  The Flask project is honest about
-thread-locals, does not hide them, and calls out in the code and documentation
-where they are used.
-
-Develop for the Web with Caution
---------------------------------
-
-Always keep security in mind when building web applications.
-
-If you write a web application, you are probably allowing users to register
-and leave their data on your server.  The users are entrusting you with data.
-And even if you are the only user that might leave data in your application,
-you still want that data to be stored securely.
-
-Unfortunately, there are many ways the security of a web application can be
-compromised.  Flask protects you against one of the most common security
-problems of modern web applications: cross-site scripting (XSS).  Unless you
-deliberately mark insecure HTML as secure, Flask and the underlying Jinja2
-template engine have you covered.  But there are many more ways to cause
-security problems.
-
-The documentation will warn you about aspects of web development that require
-attention to security.  Some of these security concerns are far more complex
-than one might think, and we all sometimes underestimate the likelihood that a
-vulnerability will be exploited - until a clever attacker figures out a way to
-exploit our applications.  And don't think that your application is not
-important enough to attract an attacker.  Depending on the kind of attack,
-chances are that automated bots are probing for ways to fill your database with
-spam, links to malicious software, and the like.
-
-Flask is no different from any other framework in that you the developer must
-build with caution, watching for exploits when building to your requirements.

docs/index.rst

@@ -37,7 +37,6 @@ instructions for web development with Flask.
    :maxdepth: 2
 
    foreword
-   advanced_foreword
    installation
    quickstart
    tutorial/index