Remove the pip3.x entrypoint from the pip wheel

The pip3.x entrypoint in the pip wheel was misleading,
because the pip wheel works for any python 3 version.
Pip continues to special-case itself to generate that
version specific entry point when it installs itself.

Author: sbidoul

pyproject.toml

@@ -1,5 +1,5 @@
 [project]
-dynamic = ["version", "scripts"]
+dynamic = ["version"]
 
 name = "pip"
 description = "The PyPA recommended tool for installing Python packages."
@@ -29,6 +29,10 @@ authors = [
 # When changing this value, please change the other copy as well.
 requires-python = ">=3.8"
 
+[project.scripts]
+pip = "pip._internal.cli.main:main"
+pip3 = "pip._internal.cli.main:main"
+
 [project.urls]
 Homepage = "https://pip.pypa.io/"
 Documentation = "https://pip.pypa.io"

setup.py

@@ -1,13 +1,3 @@
-import sys
-
 from setuptools import setup
 
-setup(
-    entry_points={
-        "console_scripts": [
-            "pip=pip._internal.cli.main:main",
-            f"pip{sys.version_info[0]}=pip._internal.cli.main:main",
-            "pip{}.{}=pip._internal.cli.main:main".format(*sys.version_info[:2]),
-        ],
-    },
-)
+setup()