FS-10373: remove last bits of old in tree lua references from build system

configure.ac

@@ -604,9 +604,6 @@ done
 if test x"${LUA_LIBS}" = x"" ; then
    LUA_LIBS="-llua"
 fi
-#AC_ARG_ENABLE([system-lua],[AS_HELP_STRING([--enable-system-lua],[use system lib for lua])],,[enable_system_lua="no"])
-enable_system_lua=yes
-AM_CONDITIONAL([SYSTEM_LUA],[test "${enable_system_lua}" = "yes"])
 
 AC_ARG_ENABLE(srtp,
 [AC_HELP_STRING([--disable-srtp],[build without srtp support])],[enable_srtp="$enableval"],[enable_srtp="yes"])

src/mod/languages/mod_lua/Makefile.am

@@ -7,22 +7,11 @@ AM_CFLAGS += $(CFLAGS) -D_GNU_SOURCE
 mod_LTLIBRARIES = mod_lua.la
 mod_lua_la_SOURCES = mod_lua.cpp freeswitch_lua.cpp mod_lua_wrap.cpp
 
-if SYSTEM_LUA
 mod_lua_la_CXXFLAGS = $(AM_CPPFLAGS) $(LUA_CFLAGS) $(CPPFLAGS)
 mod_lua_la_CFLAGS   = $(AM_CPPFLAGS) $(LUA_CFLAGS) $(CPPFLAGS)
-else
-mod_lua_la_SOURCES += lua/lapi.c lua/lcode.c lua/lctype.c lua/ldebug.c lua/ldo.c lua/ldump.c lua/lfunc.c lua/lgc.c lua/llex.c lua/lmem.c lua/lobject.c lua/lopcodes.c lua/lparser.c lua/lstate.c lua/lstring.c lua/ltable.c lua/ltm.c lua/lundump.c lua/lvm.c lua/lzio.c lua/lauxlib.c lua/lbaselib.c lua/lbitlib.c lua/lcorolib.c lua/ldblib.c lua/liolib.c lua/lmathlib.c lua/loslib.c lua/lstrlib.c lua/ltablib.c lua/loadlib.c lua/linit.c
-LUA_DIR=$(switch_srcdir)/src/mod/languages/mod_lua/lua
-mod_lua_la_CXXFLAGS = -I$(LUA_DIR) $(AM_CPPFLAGS) -DLUA_USE_LINUX
-mod_lua_la_CFLAGS = -I$(LUA_DIR) $(AM_CPPFLAGS) -DLUA_USE_LINUX
-endif
 
 mod_lua_la_LIBADD = $(switch_builddir)/libfreeswitch.la 
-mod_lua_la_LDFLAGS = -avoid-version -module -no-undefined -shared -lm $(AM_LDFLAGS) $(SOLINK)
-
-if SYSTEM_LUA
-mod_lua_la_LDFLAGS += $(LUA_LIBS)
-endif
+mod_lua_la_LDFLAGS = -avoid-version -module -no-undefined -shared -lm $(AM_LDFLAGS) $(SOLINK) $(LUA_LIBS)
 
 reswig: swigclean lua_wrap