HV: remove unused function sbuf_is_empty and sbuf_get

Change-Id: I5fc3c472d445fc7a60c65e87cef692471ce6a26a
Tracked-On: #3123
Signed-off-by: yliu79 <ying2.liu@intel.com>
Reviewed-by: Yin Fengwei <fengwei.yin@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

Author: ying2liu

hypervisor/debug/sbuf.c

@@ -15,11 +15,6 @@
 #include <cpu.h>
 #include <per_cpu.h>
 
-static inline bool sbuf_is_empty(const struct shared_buf *sbuf)
-{
-	return (sbuf->head == sbuf->tail);
-}
-
 uint32_t sbuf_next_ptr(uint32_t pos_arg,
 		uint32_t span, uint32_t scope)
 {
@@ -29,30 +24,6 @@ uint32_t sbuf_next_ptr(uint32_t pos_arg,
 	return pos;
 }
 
-uint32_t sbuf_get(struct shared_buf *sbuf, uint8_t *data)
-{
-	const void *from;
-	uint32_t ele_size;
-
-	stac();
-	if (sbuf_is_empty(sbuf)) {
-		clac();
-		/* no data available */
-		return 0;
-	}
-
-	from = (void *)sbuf + SBUF_HEAD_SIZE + sbuf->head;
-
-	(void)memcpy_s((void *)data, sbuf->ele_size, from, sbuf->ele_size);
-
-	sbuf->head = sbuf_next_ptr(sbuf->head, sbuf->ele_size, sbuf->size);
-
-	ele_size = sbuf->ele_size;
-	clac();
-
-	return ele_size;
-}
-
 /**
  * The high caller should guarantee each time there must have
  * sbuf->ele_size data can be write form data and this function