Remove old/unused doxygen files

openair3/DOCS/DOXYGEN/Makefile.am

-#/*
-# * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
-# * contributor license agreements.  See the NOTICE file distributed with
-# * this work for additional information regarding copyright ownership.
-# * The OpenAirInterface Software Alliance licenses this file to You under
-# * the OAI Public License, Version 1.1  (the "License"); you may not use this file
-# * except in compliance with the License.
-# * You may obtain a copy of the License at
-# *
-# *      http://www.openairinterface.org/?page_id=698
-# *
-# * Unless required by applicable law or agreed to in writing, software
-# * distributed under the License is distributed on an "AS IS" BASIS,
-# * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# * See the License for the specific language governing permissions and
-# * limitations under the License.
-# *-------------------------------------------------------------------------------
-# * For more information about the OpenAirInterface (OAI) Software Alliance:
-# *      contact@openairinterface.org
-# */
-
-if HAVE_DOXYGEN
-directory = $(top_srcdir)/DOCS/Documentation
-
-if HAVE_PDFLATEX
-	doc_DATA = $(directory)oaisim_mme.pdf
-else
-	doc_DATA = $(directory)
-endif
-$(directory): doxyfile.stamp
-
-doxyfile.stamp:
-	$(DOXYGEN) Doxyfile
-	echo Timestamp > doxyfile.stamp
-
-CLEANFILES = doxyfile.stamp
-
-all-local: doxyfile.stamp
-clean-local:
-	rm -f doxyfile.stamp
-	rm -rf $(top_srcdir)/DOCS/Documentation/html
-	rm -rf $(top_srcdir)/DOCS/Documentation/latex
-endif