Remove .devcontainer

[louislam]

Description

It doesn't seem to be working now and I am not interested to maintain it anymore. Drop it to avoid confusion.

Local development is preferred,

Type of change

Please delete any options that are not relevant.

• Other
• This change requires a documentation update

Checklist

• My code follows the style guidelines of this project
• I ran ESLint and other linters for modified files
• I have performed a self-review of my own code and tested it
• I have commented my code, particularly in hard-to-understand areas (including JSDoc for methods)
• My changes generates no new warnings
• My code needed automated testing. I have added them (this is optional task)

Screenshots (if any)

Please do not use any external image service. Instead, just paste in or drag and drop the image here, and it will be uploaded automatically.

[CommanderStorm]

I also don't use that part. @chakflying do you use it?

[chakflying]

Have not used this in a long time, I'm fine with removing it.