Remove unnecessary ignore files.

In this commit we remove user_sidebar_actions.handlebars from
IGNORE_FILES as well remove the check for files to be in a
IGNORE list thus reaching 100% 4 space indent checking for
handlebar templates.

Fixes: #1661.

tools/check-templates

@@ -212,13 +212,7 @@ def check_handlebar_templates(templates):
     for fn in templates:
         validate(fn=fn, check_indent=True)
 
-    # Ignore these files since these have not been cleaned yet :/
-    IGNORE_FILES = [
-        'static/templates/user_sidebar_actions.handlebars',
-    ]
-    # TODO: Clean these files
     for fn in templates:
-        if fn not in IGNORE_FILES:
         if not validate_indent_html(fn):
             sys.exit(1)