chore: remove msrv from workflow, dont care rn

.github/workflows/check.yml

@@ -92,22 +92,3 @@ jobs:
       # --feature-powerset runs for every combination of features
       - name: cargo hack
         run: cargo hack --feature-powerset check
-  msrv:
-    # check that we can build using the minimal rust version that is specified by this crate
-    runs-on: ubuntu-latest
-    # we use a matrix here just because env can't be used in job names
-    # https://docs.github.com/en/actions/learn-github-actions/contexts#context-availability
-    strategy:
-      matrix:
-        msrv: ["1.56.1"] # 2021 edition requires 1.56
-    name: ubuntu / ${{ matrix.msrv }}
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - name: Install ${{ matrix.msrv }}
-        uses: dtolnay/rust-toolchain@master
-        with:
-          toolchain: ${{ matrix.msrv }}
-      - name: cargo +${{ matrix.msrv }} check
-        run: cargo check