pdr: Remove redundant constant for minimum numeric sensor PDR length

The minimum length of the PDR message is defined as
`PLDM_PDR_NUMERIC_SENSOR_PDR_MIN_LENGTH` in `libpldm/platform.h`. No
need to redefine.

Fixes: 7992eb8415cb ("Add numeric sensor PDR and sensor aux names PDR")
Signed-off-by: Thu Nguyen <thu@os.amperecomputing.com>
Change-Id: Ia8564d92c8683fa29572dc4662dc0edd8f726a73
diff --git a/src/platform.c b/src/platform.c
index 9364da3..a614ce5 100644
--- a/src/platform.c
+++ b/src/platform.c
@@ -1510,7 +1510,6 @@
 	return pldm_msgbuf_destroy_consumed(buf);
 }
 
-#define PLDM_NUMERIC_SENSOR_VALUE_PDR_MIN_SIZE 69
 LIBPLDM_ABI_STABLE
 int decode_numeric_sensor_pdr_data(
 	const void *pdr_data, size_t pdr_data_length,
@@ -1520,7 +1519,7 @@
 	struct pldm_msgbuf *buf = &_buf;
 	int rc;
 
-	rc = pldm_msgbuf_init(buf, PLDM_NUMERIC_SENSOR_VALUE_PDR_MIN_SIZE,
+	rc = pldm_msgbuf_init(buf, PLDM_PDR_NUMERIC_SENSOR_PDR_MIN_LENGTH,
 			      pdr_data, pdr_data_length);
 	if (rc) {
 		return rc;
@@ -1532,7 +1531,7 @@
 	}
 
 	rc = pldm_platform_pdr_hdr_validate(
-		&pdr_value->hdr, PLDM_NUMERIC_SENSOR_VALUE_PDR_MIN_SIZE,
+		&pdr_value->hdr, PLDM_PDR_NUMERIC_SENSOR_PDR_MIN_LENGTH,
 		pdr_data_length);
 	if (rc) {
 		return rc;