remove china mainland docker registry mirror in install.sh

[STRRL]

Feature Request

Request:

Remove docker_mirror feature and related codes in install.sh.

Reason:

• dockerhub.azk8s.cn( also gcr.azk8s.cn and quay.azk8s.cn) could not access with public network anymore, related issue install.sh --docker-mirror not work #2294
• After release-2.1, we moved docker images from dockerhub to ghcr.io, there are no other docker registry mirror(s) supporting ghcr.io in china mainland right now.

[rksharma95]

I am new to this project and would like to work on this issue, I checked install.sh we can easily remove it from the FLAGS but at places, it is the part of a conditional statement @STRRL can you help to understand the issue and code dependency well.

[STRRL]

Hi @rksharma95 I think we could just remove all the codes about docker_mirror directly. If some conditional statement using it, just remove it.

[STRRL]

/assign @rksharma95

[rksharma95]

Hi @rksharma95 I think we could just remove all the codes about docker_mirror directly. If some conditional statement using it, just remove it.

thanks, I started working on it will submit a PR after I complete it.