builtins: remove unused imports (#4715)

Co-authored-by: hauntsaninja <>

stdlib/3/builtins.pyi

@@ -12,7 +12,6 @@ from _typeshed import (
     SupportsLessThanT,
     SupportsWrite,
 )
-from abc import ABCMeta
 from ast import AST, mod
 from io import BufferedRandom, BufferedReader, BufferedWriter, FileIO, TextIOWrapper
 from types import CodeType, TracebackType
@@ -20,7 +19,6 @@ from typing import (
     IO,
     AbstractSet,
     Any,
-    AnyStr,
     BinaryIO,
     ByteString,
     Callable,