Update Include/cpython/longintrepr.h

Co-authored-by: Mark Shannon <mark@hotpy.org>

Author: eendebakpt

Include/cpython/longintrepr.h

@@ -76,7 +76,7 @@ typedef long stwodigits; /* signed variant of twodigits */
     - 1: Zero
     - 2: Negative
 
-   The third lowest bit of lv_tag is reserved for an immortality flag, and is
+   The third lowest bit of lv_tag is
    set to 1 for the small ints.
 
    In a normalized number, ob_digit[ndigits-1] (the most significant