CLEANUP: remove unused variable assigned found by Coverity

this is pure cleanup, no need to backport

2116        if ((end - 1) == (payload + strlen(PAYLOAD_PATTERN))) {
2117                /* if the payload pattern is at the end */
2118                s->pcli_flags |= PCLI_F_PAYLOAD;
    CID 1399833 (#1 of 1): Unused value (UNUSED_VALUE)assigned_value: Assigning value from reql to ret here, but that stored value is overwritten before it can be used.
2119                ret = reql;
2120        }

This patch fixes the issue #1048.
diff --git a/src/cli.c b/src/cli.c
index bfce9a6..8b32e76 100644
--- a/src/cli.c
+++ b/src/cli.c
@@ -2184,7 +2184,6 @@
 	if ((end - 1) == (payload + strlen(PAYLOAD_PATTERN))) {
 		/* if the payload pattern is at the end */
 		s->pcli_flags |= PCLI_F_PAYLOAD;
-		ret = reql;
 	}
 
 	*(end-1) = '\n';