refactor: remove shfmt

ci/dev/fmt.sh

@@ -4,8 +4,6 @@ set -euo pipefail
 main() {
   cd "$(dirname "$0")/../.."
 
-  shfmt -i 2 -w -sr $(git ls-files "*.sh" | grep -v "lib/vscode")
-
   local prettierExts
   prettierExts=(
     "*.js"

ci/images/centos7/Dockerfile

@@ -26,7 +26,6 @@ ENV PATH=/usr/local/go/bin:$GOPATH/bin:$PATH
 
 # Install Go dependencies
 ENV GO111MODULE=on
-RUN go get mvdan.cc/sh/v3/cmd/shfmt
 RUN go get github.com/goreleaser/nfpm/cmd/nfpm@v1.9.0
 
 RUN curl -fsSL https://get.docker.com | sh

ci/images/debian10/Dockerfile

@@ -42,7 +42,6 @@ ENV PATH=/usr/local/go/bin:$GOPATH/bin:$PATH
 
 # Install Go dependencies
 ENV GO111MODULE=on
-RUN go get mvdan.cc/sh/v3/cmd/shfmt
 RUN go get github.com/goreleaser/nfpm/cmd/nfpm@v1.9.0
 
 RUN VERSION="$(curl -fsSL https://storage.googleapis.com/kubernetes-release/release/stable.txt)" && \

docs/CONTRIBUTING.md

@@ -2,6 +2,7 @@
 <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
 # Contributing
 
+- [Contributing](#contributing)
   - [Pull Requests](#pull-requests)
   - [Requirements](#requirements)
   - [Development Workflow](#development-workflow)
@@ -36,7 +37,6 @@ There are several differences, however. You must:
 - Use Node.js version 12.x (or greater)
 - Have [yarn](https://classic.yarnpkg.com/en/) installed (which is used to install JS packages and run development scripts)
 - Have [nfpm](https://github.com/goreleaser/nfpm) (which is used to build `.deb` and `.rpm` packages and [jq](https://stedolan.github.io/jq/) (used to build code-server releases) installed
-- Have [shfmt](https://pkg.go.dev/mvdan.cc/sh/v3) installed to run `yarn fmt` (requires Go is installed on your system)
 
 The [CI container](../ci/images/debian10/Dockerfile) is a useful reference for all
 of the dependencies code-server uses.