remove rspro_client.c which is not used anyway.

This was more or less a copy+paste of other related code we already
have for other IPA based protocols in libosmo*.

Change-Id: I21ade32fec3c1badfcf6bc9cd4ec845efed138e0
diff --git a/src/Makefile.am b/src/Makefile.am
index 1514a16..2e9283b 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -9,7 +9,7 @@
 libosmo_rspro_la_LDFLAGS = $(AM_LDFLAGS) -version-info $(RSPRO_LIBVERSION)
 libosmo_rspro_la_LIBADD = $(OSMOCORE_LIBS) $(OSMOGSM_LIBS) $(OSMOABIS_LIBS) \
 			  $(ASN1C_LIBS) rspro/libosmo-asn1-rspro.la
-libosmo_rspro_la_SOURCES = rspro_util.c rspro_client.c
+libosmo_rspro_la_SOURCES = rspro_util.c
 
 noinst_HEADERS = bankd.h internal.h rspro_util.h