Remove automake support

Since the cmake tool chain is now stable, the automake tool chain is removed from musrfit.
This makes documentation and code less cluttered.

src/external/mud/Makefile.am

@@ -1,2 +0,0 @@
-
-SUBDIRS = src

src/external/mud/src/Makefile.am

@@ -1,27 +0,0 @@
-## Process this file with automake to create Makefile.in
-
-h_sources = mud.h
-cpp_sources = mud_all.c \
-              mud.c \
-	      mud_encode.c \
-	      mud_friendly.c \
-	      mud_gen.c \
-  	      mud_new.c \
-	      mud_tri_ti.c
-
-include_HEADERS = mud.h
-
-AM_CPPFLAGS = -I.
-AM_CFLAGS = $(LOCAL_MUD_LIB_CFLAGS)
-
-AM_LDFLAGS = $(LOCAL_LIB_LDFLAGS)
-CLEANFILES = *~ core
-
-lib_LTLIBRARIES = libmud.la
-
-libmud_la_SOURCES = $(h_sources) $(cpp_sources)
-libmud_la_LDFLAGS = $(AM_LDFLAGS)
-
-pkgconfigdir = $(libdir)/pkgconfig
-pkgconfig_DATA = mud.pc
-