drop flask 0.9 support, remove unused code

.travis.yml

@@ -6,7 +6,6 @@ python:
 env:
   - FLASK=0.11
   - FLASK=0.10.1
-  - FLASK=0.9
 install:
   - pip install Flask==$FLASK
   - pip install -r dev_requirements.txt

README.md

@@ -13,7 +13,7 @@ First, install Flask-SimpleLDAP:
     $ pip install flask-simpleldap
     
 Flask-SimpleLDAP depends, and will install for you, recent versions of Flask
-(0.9 or later) and [pyldap](https://github.com/pyldap/pyldap). Flask-SimpleLDAP is compatible
+(0.10.1 or later) and [pyldap](https://github.com/pyldap/pyldap). Flask-SimpleLDAP is compatible
 with and tested on Python 2.7, 3.4 and 3.5.
 
 Next, add a ``LDAP`` instance to your code and at least the three

docs/index.rst

@@ -19,7 +19,7 @@ First, install Flask-SimpleLDAP:
     $ pip install flask-simpleldap
 
 Flask-SimpleLDAP depends, and will install for you, recent versions of Flask
-(0.9 or later) and pyldap. Flask-SimpleLDAP is compatible
+(0.10.1 or later) and pyldap. Flask-SimpleLDAP is compatible
 with and tested on Python 2.7, 3.4 and 3.5.
 
 Next, add a :class:`~flask_simpleldap.LDAP` to your code and at least the three

flask_simpleldap/__init__.py

@@ -8,11 +8,6 @@ from flask import abort, current_app, g, make_response, redirect, url_for, \
 
 __all__ = ['LDAP']
 
-try:
-    from flask import _app_ctx_stack as stack
-except ImportError:
-    from flask import _request_ctx_stack as stack
-
 
 class LDAPException(RuntimeError):
     message = None

setup.py

@@ -21,7 +21,7 @@ setup(
     include_package_data=True,
     platforms='any',
     install_requires=[
-        'Flask>=0.10',
+        'Flask>=0.10.1',
         'pyldap'
     ],
     classifiers=[