include: remove internal definition that are now in libosmocore

Still in one separate patch for libosmocore, but they may become
part of mainline soon.
diff --git a/include/osmocom/abis/logging.h b/include/osmocom/abis/logging.h
new file mode 100644
index 0000000..c3cac11
--- /dev/null
+++ b/include/osmocom/abis/logging.h
@@ -0,0 +1,16 @@
+#ifndef _OSMO_ABIS_LOGGING_H_
+#define _OSMO_ABIS_LOGGING_H_
+
+#include <osmocom/core/logging.h>
+
+/* logging subsystems. */
+enum {
+	DINP	= OSMO_LOG_SS_ABIS_RESERVED,
+	DMUX,
+	DMI,
+	DMIB,
+	DRSL,
+	DNM,
+};
+
+#endif