Remove epydoc.conf

it doesn't work with Python 3 and epydoc is no longer under development

doc/epydoc.conf

-[epydoc]
-
-# Information about the project.
-name: Gajim
-url: http://gajim.org
-
-verbosity: 3
-imports: yes
-redundant-details: yes
-docformat: restructuredtext
-# top: gajim
-
-# The list of modules to document.  Modules can be named using
-# dotted names, module filenames, or package directory names.
-# This option may be repeated.
-modules: gajim/* test/*
-
-# Write html output to the directory "apidocs"
-#output: pdf
-output: html
-target: doc/apidocs/
-
-# Include all automatically generated graphs.  These graphs are
-# generated using Graphviz dot.
-graph: all
-dotpath: /usr/bin/dot
-graph-font: Sans
-graph-font-size: 10
-