python: remove fix-GenericAlias patch (#7433)

It does not seem to be necessary any more, and it causes issues:
https://github.com/termux/termux-packages/issues/7432

packages/python/build.sh

@@ -4,7 +4,7 @@ TERMUX_PKG_LICENSE="PythonPL"
 TERMUX_PKG_MAINTAINER="@termux"
 _MAJOR_VERSION=3.9
 TERMUX_PKG_VERSION=${_MAJOR_VERSION}.6
-TERMUX_PKG_REVISION=4
+TERMUX_PKG_REVISION=5
 TERMUX_PKG_SRCURL=https://www.python.org/ftp/python/${TERMUX_PKG_VERSION}/Python-${TERMUX_PKG_VERSION}.tar.xz
 TERMUX_PKG_SHA256=397920af33efc5b97f2e0b57e91923512ef89fc5b3c1d21dbfc8c4828ce0108a
 TERMUX_PKG_DEPENDS="gdbm, libandroid-support, libbz2, libcrypt, libffi, liblzma, libsqlite, ncurses, ncurses-ui-libs, openssl, readline, zlib"

packages/python/fix-GenericAlias.patch

@@ -1,13 +0,0 @@
-diff --git a/Lib/_collections_abc.py b/Lib/_collections_abc.py
-index b6ecf8e..73fa666 100644
---- a/Lib/_collections_abc.py
-+++ b/Lib/_collections_abc.py
-@@ -413,7 +413,7 @@ def __subclasshook__(cls, C):
-         return NotImplemented
- 
- 
--class _CallableGenericAlias(GenericAlias):
-+class _CallableGenericAlias(list[int]):
-     """ Represent `Callable[argtypes, resulttype]`.
- 
-     This sets ``__args__`` to a tuple containing the flattened``argtypes``