Remove liquibase

Author: misery

extended_bots/liquibase.py

@@ -18,7 +18,6 @@
     entry_points={
         'reviewbot.tools': [
             'chardetector = extended_bots.chardetector:ChardetectorTool',
-            'liquibase = extended_bots.liquibase:LiquibaseTool',
             'regex = extended_bots.regex:RegexTool',
             'uncrustify = extended_bots.uncrustify:UncrustifyTool',
         ],