Remove the blue color workaround for Windows

[sindresorhus]

The illegible blue color has been fixed in Windows 10 build 16257: https://blogs.msdn.microsoft.com/commandline/2017/08/02/updating-the-windows-console-colors/

The workaround causes all kinds of problems, so better to remove it than adding conditionals for older Windows versions.

Fixes #329

[sindresorhus]

@be5invis Do you know if #58 has been fixed in Windows 10 yet? Would have been nice to be able to remove

chalk/index.js

Lines 144 to 145 in 60959e0

	// See below for fix regarding invisible grey/dim combination on Windows
	builder.hasGrey = this.hasGrey || key === 'gray' || key === 'grey';

too.

[be5invis]

@sindresorhus
This is in RS5 (1809)

The workaround may be still needed for legacy versions (7, 8, etc.). Perhaps you can still enable it for old versions.

[sindresorhus]

@be5invis #58 was using cmd.exe, not PowerShell.

[be5invis]

@sindresorhus

Node version is 10.
I think this is more clear.
I do not have older builds currently (though there server have all the historical Windows builds).
You can remove these workarounds only for version >= 17763.

[Qix-]

Have they also fixed the dim issue entirely? If so then let's remove the simple windows term check entirely as @be5invis mentioned.

[sindresorhus]

Have they also fixed the dim issue entirely? If so then let's remove the simple windows term check entirely as @be5invis mentioned.

Seems so from the comments above. I'll do that in a separate PR.

[sindresorhus]

You can remove these workarounds only for version >= 17763.

Not interested in supporting older builds. This workaround complicates a lot of code. Users can easily upgrade to latest Windows builds.

[sindresorhus]

#331