[mod] drop obsolete searx.brand namespace

The usages of the searx.brand namespace has been removed, the searx.brand
namespace is now longer needed.

The searx.brand namespace was an interim solution which has been added in commit
9e53470b4, see commit message there ...

    This patch is a first 'proof of concept'.  Later we can decide to remove the
    brand namespace entirely or not.

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/__init__.py

@@ -53,47 +53,3 @@ def get_setting(name, default=_unset):
             break
 
     return value
-
-class _brand_namespace:  # pylint: disable=invalid-name
-
-    @classmethod
-    def get_val(cls, group, name, default=''):
-        return settings.get(group, {}).get(name) or default
-
-    @property
-    def SEARX_URL(self):
-        return self.get_val('server', 'base_url')
-
-    @property
-    def CONTACT_URL(self):
-        return self.get_val('general', 'contact_url')
-
-    @property
-    def GIT_URL(self):
-        return self.get_val('brand', 'git_url')
-
-    @property
-    def GIT_BRANCH(self):
-        return self.get_val('brand', 'git_branch')
-
-    @property
-    def ISSUE_URL(self):
-        return self.get_val('brand', 'issue_url')
-
-    @property
-    def NEW_ISSUE_URL(self):
-        return self.get_val('brand', 'new_issue_url')
-
-    @property
-    def DOCS_URL(self):
-        return self.get_val('brand', 'docs_url')
-
-    @property
-    def PUBLIC_INSTANCES(self):
-        return self.get_val('brand', 'public_instances')
-
-    @property
-    def WIKI_URL(self):
-        return self.get_val('brand', 'wiki_url')
-
-brand = _brand_namespace()