Fix CQS signal facebook-unused-include-check in fbcode/pytorch/tokenizers/src [A] (#114)

Summary: Pull Request resolved: #114

Reviewed By: dtolnay

Differential Revision: D78219664

Author: CodemodService Bot

src/regex_lookahead.cpp

@@ -12,7 +12,6 @@
 #include <pytorch/tokenizers/regex.h>
 #include <pytorch/tokenizers/std_regex.h>
 
-#include <iostream>
 #include <memory>
 
 namespace tokenizers {