transport: mctp-demux: Drop ABI annotation for internal symbols

The symbols need to be exposed beyond the translation unit and so cannot
be static, but we also do not want them exposed in the public symbol
table of the shared object as they only exist for internal purposes.

Drop the ABI annotation so the symbols are hidden from the symbol table
by the linker.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: I1316705277b683767ab15bb6526010b0c7c6e121
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 471449f..70e8529 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -24,6 +24,7 @@
 ### Changed
 
 1. transport: Match specified metadata in pldm_transport_send_recv_msg()
+2. transport: mctp-demux: Drop ABI annotation for internal symbols
 
 ## [0.6.0] - 2023-08-22
 
diff --git a/src/transport/mctp-demux.c b/src/transport/mctp-demux.c
index 240f931..f9f11f0 100644
--- a/src/transport/mctp-demux.c
+++ b/src/transport/mctp-demux.c
@@ -277,7 +277,6 @@
 }
 
 /* Temporary for old API */
-LIBPLDM_ABI_TESTING
 struct pldm_transport_mctp_demux *
 pldm_transport_mctp_demux_init_with_fd(int mctp_fd)
 {
@@ -310,7 +309,6 @@
 	return demux;
 }
 
-LIBPLDM_ABI_TESTING
 int pldm_transport_mctp_demux_get_socket_fd(
 	struct pldm_transport_mctp_demux *ctx)
 {