google/gve:fix repeated words in comments

Delete the redundant word 'a'.
Signed-off-by: Jilin Yuan <yuanjilin@cdjrlc.com>
Link: https://lore.kernel.org/r/20220629130013.3273-1-yuanjilin@cdjrlc.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/google/gve/gve_tx_dqo.c

@@ -795,7 +795,7 @@ static void gve_handle_packet_completion(struct gve_priv *priv,
 			     GVE_PACKET_STATE_PENDING_REINJECT_COMPL)) {
 			/* No outstanding miss completion but packet allocated
 			 * implies packet receives a re-injection completion
-			 * without a a prior miss completion. Return without
+			 * without a prior miss completion. Return without
 			 * completing the packet.
 			 */
 			net_err_ratelimited("%s: Re-injection completion received without corresponding miss completion: %d\n",