avocado.settings: Remove method we're not going to use now

I thought it'd be useful right away, but turns out we
can wait to add it, should the need arise.
Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>

avocado/settings.py

@@ -123,23 +123,5 @@ class Settings(object):
 
         return convert_value_type(key, section, val, key_type)
 
-    def get_section_values(self, sections):
-        """
-        Return a config parser object containing a single section of the
-        global configuration, that can be later written to a file object.
-
-        :param section: Tuple with sections we want to turn into a config parser
-                object.
-        :return: ConfigParser() object containing all the contents of sections.
-        """
-        if isinstance(sections, str):
-            sections = [sections]
-        cfgparser = ConfigParser.ConfigParser()
-        for section in sections:
-            cfgparser.add_section(section)
-            for option, value in self.config.items(section):
-                cfgparser.set(section, option, value)
-        return cfgparser
-
 
 settings = Settings()