Remove deprecate action

https://old.reddit.com/r/rust/comments/vyx4oj/actionsrs_organization_became_unmaintained/ Looking at this holistically, I don't fully understand *why* we need an action here? Seems like we can just use rustup? nowadays github runners come with rustup pre-installed.

Author: matklad

.github/workflows/ci.yaml

@@ -38,7 +38,9 @@ jobs:
  fetch-depth: 20
 
  - name: Install Rust toolchain
- run: rustup update stable && rustup component add rustfmt rust-src
+ run: |
+ rustup update stable
+ rustup component add rustfmt rust-src
 
  - name: Cache Dependencies
  uses: Swatinem/rust-cache@ce325b60658c1b38465c06cc965b79baf32c1e72
@@ -66,10 +68,9 @@ jobs:
  uses: actions/checkout@v3
 
  - name: Install Rust toolchain
- run: rustup update stable
-
- - name: Install Rust targets
- run: rustup target add ${{ env.targets }} ${{ env.targets_ide }}
+ run: |
+ rustup update stable
+ rustup target add ${{ env.targets }} ${{ env.targets_ide }}
 
  - name: Cache Dependencies
  uses: Swatinem/rust-cache@ce325b60658c1b38465c06cc965b79baf32c1e72

.github/workflows/metrics.yaml

@@ -20,7 +20,9 @@ jobs:
  uses: actions/checkout@v3
 
  - name: Install Rust toolchain
- run: rustup update stable && rustup component add rustfmt rust-src
+ run: |
+ rustup update stable
+ rustup component add rustfmt rust-src
 
  - name: Collect metrics
  run: cargo xtask metrics

.github/workflows/release.yaml

@@ -55,16 +55,11 @@ jobs:
  with:
  fetch-depth: ${{ env.FETCH_DEPTH }}
 
- # We need to disable the existing toolchain to avoid updating rust-docs
- # which takes a long time. The fastest way to do this is to rename the
- # existing folder, as deleting it takes about as much time as not doing
- # anything and just updating rust-docs.
- - name: Rename existing Rust toolchain
- if: matrix.os == 'windows-latest'
- run: Rename-Item C:\Users\runneradmin\.rustup\toolchains\stable-x86_64-pc-windows-msvc C:\Users\runneradmin\.rustup\toolchains\stable-x86_64-pc-windows-msvc.old
-
  - name: Install Rust toolchain
- run: rustup update stable && rustup target add ${{ matrix.target }} && rustup component add rust-src
+ run: |
+ rustup update stable
+ rustup target add ${{ matrix.target }}
+ rustup component add rust-src
 
  - name: Install Node.js
  uses: actions/setup-node@v1