chore: remove unused files (#7592)

#### What type of PR is this?

/area ui
/kind cleanup

#### What this PR does / why we need it:

Remove unused files.

#### Does this PR introduce a user-facing change?

```release-note
None
```

ui/.gitpod.yml

@@ -1,15 +0,0 @@
-ports:
-  - port: 3000
-    onOpen: open-browser
-
-tasks:
-  - init: npm install -g pnpm && pnpm install && pnpm build:packages
-    command: pnpm dev
-
-vscode:
-  extensions:
-    - dbaeumer.vscode-eslint
-    - editorconfig.editorconfig
-    - esbenp.prettier-vscode
-    - vue.volar
-    - vue.vscode-typescript-vue-plugin

ui/.npmignore

@@ -1,4 +0,0 @@
-/node_modules/*
-/.idea/*
-/.git/*
-/.github/*