Akuli and srittau: Remove Python 2 branches from Python 3 stubs (#5461)

* run script and do some manual changes (Akuli)

* do the whole thing manually (srittau)

* merge changes (Akuli)

Co-authored-by: Sebastian Rittau <srittau@rittau.biz>

stdlib/sunau.pyi

@@ -1,5 +1,5 @@
 import sys
-from typing import IO, Any, NamedTuple, NoReturn, Optional, Text, Tuple, Union
+from typing import IO, Any, NamedTuple, NoReturn, Optional, Text, Union
 
 _File = Union[Text, IO[bytes]]
 
@@ -20,23 +20,18 @@ AUDIO_FILE_ENCODING_ADPCM_G723_5: int
 AUDIO_FILE_ENCODING_ALAW_8: int
 AUDIO_UNKNOWN_SIZE: int
 
-if sys.version_info >= (3, 0):
-    class _sunau_params(NamedTuple):
-        nchannels: int
-        sampwidth: int
-        framerate: int
-        nframes: int
-        comptype: str
-        compname: str
-
-else:
-    _sunau_params = Tuple[int, int, int, int, str, str]
+class _sunau_params(NamedTuple):
+    nchannels: int
+    sampwidth: int
+    framerate: int
+    nframes: int
+    comptype: str
+    compname: str
 
 class Au_read:
     def __init__(self, f: _File) -> None: ...
-    if sys.version_info >= (3, 3):
-        def __enter__(self) -> Au_read: ...
-        def __exit__(self, *args: Any) -> None: ...
+    def __enter__(self) -> Au_read: ...
+    def __exit__(self, *args: Any) -> None: ...
     def getfp(self) -> Optional[IO[bytes]]: ...
     def rewind(self) -> None: ...
     def close(self) -> None: ...
@@ -55,9 +50,8 @@ class Au_read:
 
 class Au_write:
     def __init__(self, f: _File) -> None: ...
-    if sys.version_info >= (3, 3):
-        def __enter__(self) -> Au_write: ...
-        def __exit__(self, *args: Any) -> None: ...
+    def __enter__(self) -> Au_write: ...
+    def __exit__(self, *args: Any) -> None: ...
     def setnchannels(self, nchannels: int) -> None: ...
     def getnchannels(self) -> int: ...
     def setsampwidth(self, sampwidth: int) -> None: ...