Index: uspace/lib/c/generic/async_obsolete.c
===================================================================
--- uspace/lib/c/generic/async_obsolete.c	(revision a40dea38c9d586aa4f82dcde5704326ff5abae9d)
+++ uspace/lib/c/generic/async_obsolete.c	(revision 40f606b29b5ce95a00987cf0ba142df6245acdb4)
@@ -166,14 +166,4 @@
 }
 
-void async_obsolete_serialize_start(void)
-{
-	fibril_inc_sercount();
-}
-
-void async_obsolete_serialize_end(void)
-{
-	fibril_dec_sercount();
-}
-
 /** Wrapper for IPC_M_DATA_WRITE calls using the async framework.
  *
Index: uspace/lib/c/include/async_obsolete.h
===================================================================
--- uspace/lib/c/include/async_obsolete.h	(revision a40dea38c9d586aa4f82dcde5704326ff5abae9d)
+++ uspace/lib/c/include/async_obsolete.h	(revision 40f606b29b5ce95a00987cf0ba142df6245acdb4)
@@ -40,7 +40,4 @@
 #define LIBC_ASYNC_OBSOLETE_H_
 
-extern void async_obsolete_serialize_start(void);
-extern void async_obsolete_serialize_end(void);
-
 #define async_obsolete_send_0(phoneid, method, dataptr) \
 	async_obsolete_send_fast((phoneid), (method), 0, 0, 0, 0, (dataptr))