template logger - fix coverity CID 1324964

null: At condition templatejs != NULL, the value of templatejs must be
NULL.
dead_error_condition: The condition templatejs != NULL cannot be true.
113    if (templatejs != NULL) {
CID 1324964 (#1 of 1): Logically dead code (DEADCODE)
dead_error_line: Execution cannot reach this statement:
json_decref(templatejs);.
114        json_decref(templatejs);
115    }

src/output-json-template.c

@@ -110,9 +110,6 @@ static int JsonTemplateLogger(ThreadVars *tv, void *thread_data,
     return TM_ECODE_OK;
     
 error:
-    if (templatejs != NULL) {
-        json_decref(templatejs);
-    }
     json_decref(js);
     return TM_ECODE_FAILED;
 }