[libc++][NFC] Remove non-ASCII from comment.

Seems our check-generated-output doesn't work as intended. Will
investigate it further.

GitOrigin-RevId: 18b03b008588e829751ab4b945982ee301a58839
diff --git a/include/iterator b/include/iterator
index 151931b..d9a0309 100644
--- a/include/iterator
+++ b/include/iterator
@@ -52,7 +52,7 @@
 template<class Out, class T>
   concept indirectly_writable = see below;                // since C++20
 
-// [iterator.concept.winc], concept weakly_­incrementable
+// [iterator.concept.winc], concept weakly_incrementable
 template<class I>
   concept weakly_incrementable = see below;                // since C++20
 
@@ -60,11 +60,11 @@
 template<class I>
   concept incrementable = see below;                       // since C++20
 
-// [iterator.concept.iterator], concept input_­or_­output_­iterator
+// [iterator.concept.iterator], concept input_or_output_iterator
   template<class I>
     concept input_or_output_iterator = see below;          // since C++20
 
-// [iterator.concept.sentinel], concept sentinel_­for
+// [iterator.concept.sentinel], concept sentinel_for
 template<class S, class I>
   concept sentinel_for = see below;                        // since C++20