Revert "Prevent GCR encoder/decoder functions from being used directly"

We need this API for communicating GCR over the MNCC and SIP.

Change-Id: I06babb959fdc82f4e82d92260131d60c98b0abd2
Related: OS#5164
diff --git a/include/osmocom/gsm/gsm29205.h b/include/osmocom/gsm/gsm29205.h
index 9575456..f93e34a 100644
--- a/include/osmocom/gsm/gsm29205.h
+++ b/include/osmocom/gsm/gsm29205.h
@@ -37,6 +37,6 @@
 	uint8_t cr[5];   /** Call Reference ID */
 };
 
-uint8_t osmo_enc_gcr(struct msgb *msg, const struct osmo_gcr_parsed *g) OSMO_DEPRECATED_OUTSIDE_LIBOSMOCORE;
-int osmo_dec_gcr(struct osmo_gcr_parsed *gcr, const uint8_t *elem, uint8_t len) OSMO_DEPRECATED_OUTSIDE_LIBOSMOCORE;
+uint8_t osmo_enc_gcr(struct msgb *msg, const struct osmo_gcr_parsed *g);
+int osmo_dec_gcr(struct osmo_gcr_parsed *gcr, const uint8_t *elem, uint8_t len);
 bool osmo_gcr_eq(const struct osmo_gcr_parsed *gcr1, const struct osmo_gcr_parsed *gcr2);