ci: remove msrv.yml workflow as it's not really used

If it does become relevant to actually implement this is can be done at
that time. Having a non-functional stub isn't useful.

.github/workflows/CICD.yml

@@ -43,13 +43,6 @@ jobs:
   checks:
     uses: ./.github/workflows/checks.yml
 
-  min_version:
-    name: Minimum supported rust version
-    needs: checks
-    uses: ./.github/workflows/msrv.yml
-    with:
-      package: tree-sitter-cli
-
   sanitize:
     name: Sanitize
     needs: [init, checks]
@@ -64,7 +57,7 @@ jobs:
 
   release:
     name: Release
-    needs: [init, checks, min_version, build, sanitize]
+    needs: [init, checks, build, sanitize]
     if: >
       github.event_name == 'pull_request' &&
       startsWith(github.head_ref, 'release/v') &&

.github/workflows/msrv.yml

@@ -1,42 +0,0 @@
-name: Minimum supported rust version
-
-env:
-  CARGO_TERM_COLOR: always
-  RUSTFLAGS: "-D warnings"
-
-on:
-  workflow_call:
-    inputs:
-      package:
-        description: Target cargo package name
-        required: true
-        type: string
-
-
-jobs:
-  run:
-    name: Run checks
-    runs-on: ubuntu-latest
-    steps:
-
-    - name: Checkout source code
-      uses: actions/checkout@v3
-
-    - name: Get the MSRV from the package metadata
-      id: msrv
-      run: cargo metadata --no-deps --format-version 1 | jq -r '"version=" + (.packages[] | select(.name == "${{ inputs.package }}").rust_version)' >> $GITHUB_OUTPUT
-
-    - name: Install rust toolchain (v${{ steps.msrv.outputs.version }})
-      uses: dtolnay/rust-toolchain@master
-      with:
-        toolchain: ${{ steps.msrv.outputs.version }}
-        components: clippy, rustfmt
-
-    - name: Run cargo fmt
-      run: cargo fmt -- --check
-
-    # - name: Run clippy (on minimum supported rust version to prevent warnings we can't fix)
-    #   run: cargo clippy --all-targets
-
-    # - name: Run main tests
-    #   run: cargo test