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/src/input/hsl.c b/src/input/hsl.c
index 068989b..f00338f 100644
--- a/src/input/hsl.c
+++ b/src/input/hsl.c
@@ -51,6 +51,7 @@
 #include <osmocom/core/logging.h>
 #include <osmocom/abis/ipaccess.h>
 #include <osmocom/core/socket.h>
+#include <osmocom/abis/logging.h>
 #include <talloc.h>
 
 #define HSL_TCP_PORT	2500