configure.ac: do not require unused dlsym/dlopen

Change-Id: Ib1a208c40ba9c3667980e5c404087e801a4eaaf1
diff --git a/configure.ac b/configure.ac
index 48021aa..395248e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -38,13 +38,6 @@
 CFLAGS="$CFLAGS -std=gnu11"
 
 dnl checks for libraries
-AC_SEARCH_LIBS([dlopen], [dl dld], [LIBRARY_DL="$LIBS";LIBS=""])
-AC_SUBST(LIBRARY_DL)
-
-AC_SEARCH_LIBS([dlsym], [dl dld], [LIBRARY_DLSYM="$LIBS";LIBS=""])
-AC_SUBST(LIBRARY_DLSYM)
-
-
 PKG_CHECK_MODULES(LIBOSMOCORE, libosmocore >= 1.7.0)
 PKG_CHECK_MODULES(LIBOSMOGSM, libosmogsm >= 1.7.0)
 PKG_CHECK_MODULES(LIBOSMOVTY, libosmovty >= 1.7.0)