astlpc: Remove unused txbuf member from struct mctp_binding_astlpc

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: If8a55fbcd0c8d5d880cfe117432e533444a5fe7b
diff --git a/astlpc.c b/astlpc.c
index 66fa930..4014b89 100644
--- a/astlpc.c
+++ b/astlpc.c
@@ -56,9 +56,6 @@
 	uint8_t			kcs_status;
 
 	bool			running;
-
-	/* temporary transmit buffer */
-	uint8_t			txbuf[256];
 };
 
 #define binding_to_astlpc(b) \