DOC: remove incorrect sentence about subpackage imports

[lucascolley]

Issue with current documentation:

https://scipy.github.io/devdocs/tutorial/index.html#subpackages says that "SciPy subpackages need to be imported separately". This is no longer true! see https://scientific-python.org/specs/spec-0001/

Idea or request for content:

Remove the incorrect guidance. The lines are

scipy/doc/source/tutorial/index.rst

Lines 43 to 46 in e7c6a0d

	SciPy subpackages need to be imported separately, for example::
	>>> from scipy import linalg, optimize

Additional context (e.g. screenshots, GIFs)

[ShanDeng123]

Hey, I can take this one - Though, to be clear, is the full extent of the change to just remove the incorrect guidance, and update the statement

SciPy is organized into subpackages covering different scientific computing domains. These are summarized in the following table:

To be something more like

SciPy is organized into subpackages covering different scientific computing domains. SciPy subpackages can be utilized directly via Lazy Loading, and are summarized in the following table:

[lucascolley]

thanks @ShanDeng123 ! TBH I don't think we even need to mention Lazy Loading here - it isn't relevant as one of the first things that users will see in the tutorial. The following sounds good to me:

SciPy is organized into subpackages covering different scientific computing domains, which are summarized in the following table:

[ShanDeng123]

Aye aye - Sounds good!

[rgommers]

I'd much prefer to not see new guidance written indeed. @lucascolley's suggestion in the last comment above is good. In addition, you can link to https://scipy.github.io/devdocs/reference/index.html#guidelines-for-importing-functions-from-scipy.

[aadityab7]

Hello, sorry I am new here, but is there already a pull request open for this issue?

[lucascolley]

Hello, sorry I am new here, but is there already a pull request open for this issue?

No, feel free to open one!

[tactipus]

if anyone needs help, let me know! I'll be watching

[kru2710shna]

I understand the issue.

This is my first time doing it. That's how I did-
Fork the repo.
clone the repo
and do I need to follow this https://scipy.github.io/devdocs/dev/dev_quickstart.html ??

[j-bowhay]

@kru2710shna it looks like there is already an open pr to fix this so it would be best to look at a different issue to avoid duplicating work. Regardless, thank you for your interest in contributing to SciPy.

[kru2710shna]

Thanks