dotnet --info not working: Uninstalling dotnet versions documentation seems incomplete

It is straight forward, but at least in my case, the uninstall instructions do not work. Here is what i did:

----

I had the 6.0 SDK installed, as well as 3.1. I used the uninstall tool like so:
```
sudo ./dotnet-core-uninstall remove --sdk 3.1.416
```

I thought everything was fine, because the tool showed only v6.0 remaining:
```
billd@MacBeth dotnet-core-uninstall % ./dotnet-core-uninstall list

This tool cannot uninstall versions of the runtime or SDK that are installed using zip/scripts. The versions that can be uninstalled with this tool are:

.NET Core SDKs:
6.0.102 (arm64) [Used by Visual Studio for Mac. Specify individually or use —-force to remove]
6.0.101 (arm64)
6.0.100 (arm64)

.NET Core Runtimes:
6.0.2 (arm64) [Used by Visual Studio for Mac or SDKs. Specify individually or use —-force to remove]
6.0.2 (x64)
6.0.1 (arm64)
6.0.1 (x64)
6.0.0 (arm64)
6.0.0 (x64)
billd@MacBeth dotnet-core-uninstall %
```

But now I noticed that the dotnet executable disagrees with the uninstall tool about the versions - it shows no SDKs and the 3.1 runtime!
```
billd@MacBeth dotnet-core-uninstall % dotnet --list-sdks
billd@MacBeth dotnet-core-uninstall % dotnet --list-runtimes
Microsoft.AspNetCore.App 3.1.22 [/usr/local/share/dotnet/x64/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 3.1.22 [/usr/local/share/dotnet/x64/shared/Microsoft.NETCore.App]
billd@MacBeth dotnet-core-uninstall % dotnet --info
It was not possible to find any installed .NET Core SDKs
Did you mean to run .NET Core SDK commands? Install a .NET Core SDK from:
https://aka.ms/dotnet-download

Host (useful for support):
Version: 3.1.22
Commit: 35fa579a30

.NET Core SDKs installed:
No SDKs were found.

.NET Core runtimes installed:
Microsoft.AspNetCore.App 3.1.22 [/usr/local/share/dotnet/x64/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 3.1.22 [/usr/local/share/dotnet/x64/shared/Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs:
https://aka.ms/dotnet-download
billd@MacBeth dotnet-core-uninstall %
```

So i went back to the documentation and tried the manual steps - https://docs.microsoft.com/en-us/dotnet/core/install/remove-runtime-sdk-versions?pivots=os-macos#uninstall-net - but I didn't find any remnants of 3.1.
```
billd@MacBeth dotnet-core-uninstall % ls /usr/local/share/dotnet/sdk
6.0.100 6.0.101 6.0.102
billd@MacBeth dotnet-core-uninstall % ls /usr/local/share/dotnet/shared/Microsoft.NETCore.App
6.0.0 6.0.1 6.0.2
billd@MacBeth dotnet-core-uninstall % ls /usr/local/share/dotnet/shared/Microsoft.AspNetCore.App
6.0.0 6.0.1 6.0.2
billd@MacBeth dotnet-core-uninstall % ls /usr/local/share/dotnet/shared/Microsoft.AspNetCore.All
ls: /usr/local/share/dotnet/shared/Microsoft.AspNetCore.All: No such file or directory
billd@MacBeth dotnet-core-uninstall % ls /usr/local/share/dotnet/shared/
Microsoft.AspNetCore.App Microsoft.NETCore.App
billd@MacBeth dotnet-core-uninstall % ls /usr/local/share/dotnet/host/fxr
6.0.0 6.0.1 6.0.2
billd@MacBeth dotnet-core-uninstall %
```

So there must be something else going on.
I found the section on Arm based paths. There I found some 3.1 parts
```
billd@MacBeth dotnet-core-uninstall % sudo rm -rf /usr/local/share/dotnet/x64/host/fxr/3.1.22
Password:
billd@MacBeth dotnet-core-uninstall % sudo rm -rf /usr/local/share/dotnet/x64/shared/Microsoft.NETCore.App/3.1.22
billd@MacBeth dotnet-core-uninstall % sudo rm -rf /usr/local/share/dotnet/x64/shared/Microsoft.AspNetCore.App/3.1.22
```
Issue one: there was no `shared/Microsoft.AspNetCore.All` folder in the x64 or regular path. The doc says to delete that folder too, but i don't have it.

Issue two: now dotnet in broken.
```
billd@MacBeth ~ % dotnet --info
A fatal error occurred, the folder [/usr/local/share/dotnet/x64/host/fxr] does not contain any version-numbered child folders
```
Indeed there aren't any version numbered folders. Why aren't there any? And why does the uninstall tool still see several 6.0 versions installed?

---

The next step for me is to reinstall the 6.0.2 SDK to see if that resolves the issue. That is the only version I actually need.

Possible Issue three: I also wonder about the `/usr/local/share/dotnet/x64/templates` directory, as it has a 3.1.23 subfolder. Should i delete that too?

I haven't given explicit corrections for the documentation because I don't know what should change - the documentation, the installer, or the uninstall tool. But I know that taken together, there are some gaps.

Anyway, thanks for listening.

---
#### Document Details

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* ID: 4efe9b33-ff9f-3b37-e8bd-a34c0a77bd1e
* Version Independent ID: 090b8fbd-39e6-b754-e1da-890b1123f2c4
* Content: [Remove the .NET runtime and SDK](https://docs.microsoft.com/en-us/dotnet/core/install/remove-runtime-sdk-versions?pivots=os-macos)
* Content Source: [docs/core/install/remove-runtime-sdk-versions.md](https://github.com/dotnet/docs/blob/main/docs/core/install/remove-runtime-sdk-versions.md)
* Product: **dotnet**
* Technology: **dotnet-install**
* GitHub Login: @adegeo
* Microsoft Alias: **adegeo**