remove cross tests from CI

Author: Michael Freeborn

.github/workflows/ci.yml

@@ -20,33 +20,17 @@ jobs:
   run_tests:
     name: Run Rust tests
     runs-on: ubuntu-latest
-    env:
-      NATIVE_TARGET: ${{ matrix.target == 'x86_64-unknown-linux-gnu' }}
     strategy:
       fail-fast: false
-      matrix:
-        target: [x86_64-unknown-linux-gnu, armv7-unknown-linux-gnueabihf, arm-unknown-linux-gnueabihf]
     steps:
       - uses: actions/checkout@v3
 
       - uses: dtolnay/rust-toolchain@stable
 
-      - name: Install cross
-        run: cargo install cross --git https://github.com/cross-rs/cross
-        if: env.NATIVE_TARGET == 'false'
-
       - uses: Swatinem/rust-cache@v2
 
-      - name: Set test runner
-        run: |
-          if ${NATIVE_TARGET} == true; then
-            echo "test_runner=cargo" >> $GITHUB_ENV
-          else
-            echo "test_runner=cross" >> $GITHUB_ENV
-          fi
-
       - name: Run tests
-        run: ${{ env.test_runner }} test --no-fail-fast --verbose --target ${{ matrix.target }} -- --nocapture
+        run: cargo test --no-fail-fast --verbose --target x86_64-unknown-linux-gnu -- --nocapture
 
   lint:
     name: Check Rust code with rustfmt and clippy