revert kuznyechik workflow

Author: newpavlov

.github/workflows/kuznyechik.yml

@@ -27,9 +27,6 @@ jobs:
         target:
           - thumbv7em-none-eabi
           - wasm32-unknown-unknown
-        env:
-          - RUSTFLAGS: "-Dwarnings"
-          - RUSTFLAGS: "-Dwarnings --cfg kuznyechik_force_soft"
     steps:
       - uses: actions/checkout@v1
       - uses: actions-rs/toolchain@v1
@@ -39,6 +36,9 @@ jobs:
           target: ${{ matrix.target }}
           override: true
       - run: cargo build --target ${{ matrix.target }}
+      - env:
+          RUSTFLAGS: "-Dwarnings --cfg kuznyechik_force_soft"
+        run: cargo build --target ${{ matrix.target }}
 
   test:
     runs-on: ubuntu-latest
@@ -47,9 +47,6 @@ jobs:
         rust:
           - 1.49.0 # MSRV
           - stable
-        env:
-          - RUSTFLAGS: "-Dwarnings"
-          - RUSTFLAGS: "-Dwarnings --cfg kuznyechik_force_soft"
     steps:
     - uses: actions/checkout@v1
     - uses: actions-rs/toolchain@v1
@@ -59,3 +56,6 @@ jobs:
         profile: minimal
     - run: cargo test
     - run: cargo test --all-features
+    - env:
+        RUSTFLAGS: "-Dwarnings --cfg kuznyechik_force_soft"
+      run: cargo test