Remove Python 3.7 branches (#11238)

stdlib/asyncio/subprocess.pyi

@@ -4,15 +4,10 @@ from _typeshed import StrOrBytesPath
 from asyncio import events, protocols, streams, transports
 from collections.abc import Callable, Collection
 from typing import IO, Any
-from typing_extensions import Literal, TypeAlias
+from typing_extensions import Literal
 
 __all__ = ("create_subprocess_exec", "create_subprocess_shell")
 
-if sys.version_info >= (3, 8):
-    _ExecArg: TypeAlias = StrOrBytesPath
-else:
-    _ExecArg: TypeAlias = str | bytes
-
 PIPE: int
 STDOUT: int
 DEVNULL: int
@@ -74,8 +69,8 @@ if sys.version_info >= (3, 11):
         pipesize: int = -1,
     ) -> Process: ...
     async def create_subprocess_exec(
-        program: _ExecArg,
-        *args: _ExecArg,
+        program: StrOrBytesPath,
+        *args: StrOrBytesPath,
         stdin: int | IO[Any] | None = None,
         stdout: int | IO[Any] | None = None,
         stderr: int | IO[Any] | None = None,
@@ -139,8 +134,8 @@ elif sys.version_info >= (3, 10):
         pipesize: int = -1,
     ) -> Process: ...
     async def create_subprocess_exec(
-        program: _ExecArg,
-        *args: _ExecArg,
+        program: StrOrBytesPath,
+        *args: StrOrBytesPath,
         stdin: int | IO[Any] | None = None,
         stdout: int | IO[Any] | None = None,
         stderr: int | IO[Any] | None = None,
@@ -203,8 +198,8 @@ else:  # >= 3.9
         umask: int = -1,
     ) -> Process: ...
     async def create_subprocess_exec(
-        program: _ExecArg,
-        *args: _ExecArg,
+        program: StrOrBytesPath,
+        *args: StrOrBytesPath,
         stdin: int | IO[Any] | None = None,
         stdout: int | IO[Any] | None = None,
         stderr: int | IO[Any] | None = None,