Documentation suggests removed --install-scripts flag

[ndevenish]

The documentation for --install-options (online at https://pip.pypa.io/en/latest/cli/pip_install/#cmdoption-install-option) gives the example of passing --install-scripts. Since #7309 this is now an invalid option. This example should be updated (and perhaps the current way to achieve this added).

Text comes from:

pip/src/pip/_internal/cli/cmdoptions.py

Lines 799 to 810 in 87aee20

	install_options: Callable[..., Option] = partial(
	Option,
	"--install-option",
	dest="install_options",
	action="append",
	metavar="options",
	help="Extra arguments to be supplied to the setup.py install "
	'command (use like --install-option="--install-scripts=/usr/local/'
	'bin"). Use multiple --install-option options to pass multiple '
	"options to setup.py install. If you are using an option with a "
	"directory path, be sure to use absolute path.",
	)

A comment on the deprecation issue asked for this to be opened at: #7309 (comment)

[hsadia538]

@ndevenish I want to work on this.

[Patelrahul4884]

@ndevenish I can work on this issue

[Patelrahul4884]

@ndevenish do we have to completely remove install_options variable?