Resolved a fixme

Author: TobiasWrigstad

peps/pep-0795.rst

@@ -2275,8 +2275,6 @@ for immutability is provided in an (internal) ``immutability.h`` header and
 additional ``immutability.c`` file, though the C ABI macros and error function are
 defined in the appropriate public headers.
 
-**FIXME** Update to right branch!
-
 .. _reference implementation: https://github.com/mjp41/cpython/tree/immutable-main
 
 Making various types in the core and the standard library freezable (and adding/augmenting