get rid of extra aliases in imgui.core namespace (closes #65)

imgui/__init__.py

@@ -405,24 +405,3 @@
 #: active, if you want to provide your own undo/redo stack you need
 #: e.g. to call clear_active_id().
 INPUT_TEXT_NO_UNDO_REDO = core.INPUT_TEXT_NO_UNDO_REDO
-
-
-# extra aliases for backwards compatibility
-def _core_to_extra_deprecated(fn):
-    return _compat.deprecated("""
-        The imgui.core.{0}() is deprecated
-        and will be removed in 1.0.0 version of pyimgui.
-        Please use imgui.extra.{0}()
-        or imgui.{0}() instead.
-        """.format(fn.__name__)
-    )(fn)
-
-
-core.font = _core_to_extra_deprecated(extra.font)
-core.styled = _core_to_extra_deprecated(extra.styled)
-core.istyled = _core_to_extra_deprecated(extra.istyled)
-core.vertex_buffer_vertex_pos_offset = _core_to_extra_deprecated(extra.vertex_buffer_vertex_pos_offset)  # noqa
-core.vertex_buffer_vertex_uv_offset = _core_to_extra_deprecated(extra.vertex_buffer_vertex_uv_offset)  # noqa
-core.vertex_buffer_vertex_col_offset = _core_to_extra_deprecated(extra.vertex_buffer_vertex_col_offset)  # noqa
-core.vertex_buffer_vertex_size = _core_to_extra_deprecated(extra.vertex_buffer_vertex_size)  # noqa
-core.index_buffer_index_size = _core_to_extra_deprecated(extra.index_buffer_index_size)  # noqa