iRemove pretty print to_nice_json test -- the test fails on python2.6

without simplejson

test/integration/roles/test_filters/files/foo.txt

 This is a test of various filter plugins found in Ansible (ex: core.py), and 
 not so much a test of the core filters in Jinja2.
 
-Dumping a nested structure to JSON
-
-[
-    "this is a list element", 
-    {
-        "this": "is a hash element in a list", 
-        "warp": 9, 
-        "where": "endor"
-    }
-]
-
 Dumping the same structure to YAML
 
 - this is a list element

test/integration/roles/test_filters/templates/foo.j2

 This is a test of various filter plugins found in Ansible (ex: core.py), and 
 not so much a test of the core filters in Jinja2.
 
-Dumping a nested structure to JSON
-
-{{ some_structure | to_nice_json }}
-
 Dumping the same structure to YAML
 
 {{ some_structure | to_nice_yaml }}

test/integration/roles/test_filters/templates/py26json.j2

-Provoke a python2.6 json bug
-{{ hostvars | to_nice_json }}