eve/alert: Remove unused results from PrintRawLineHexBuf

This changeset removes the call to `PrintRawLineHexBuf`. The
return values were never used.

src/output-json-alert.c

@@ -659,9 +659,6 @@ static int AlertJsonDecoderEvent(ThreadVars *tv, JsonAlertLogThread *aft, const
             action = "blocked";
         }
 
-        char buf[(32 * 3) + 1];
-        PrintRawLineHexBuf(buf, sizeof(buf), GET_PKT_DATA(p), GET_PKT_LEN(p) < 32 ? GET_PKT_LEN(p) : 32);
-
         js = json_object();
         if (js == NULL)
             return TM_ECODE_OK;