Remove caching from deploy script

.github/workflows/deploy.yml

@@ -17,14 +17,9 @@ jobs:
     name: Formatting Check
     steps:
     - uses: actions/checkout@v2.3.4
-    - uses: cachix/install-nix-action@v17
+    - uses: cachix/install-nix-action@v20
       with:
         extra_nix_config: |
-          # save space on disk and in cache
-          auto-optimise-store = true
-          # keep all store paths necessary to build the outputs
-          keep-outputs = true
-          keep-derivations = true
           # Enable flakes
           experimental-features = nix-command flakes
     - name: Run format check
@@ -54,51 +49,14 @@ jobs:
         ssh-agent -a $SSH_AUTH_SOCK > /dev/null   
         ssh-add /home/runner/.ssh/*
         ssh-keyscan ${{ secrets.INSTANCE_IP }} >> /home/runner/.ssh/known_hosts
-    - uses: cachix/install-nix-action@v17
+    - uses: cachix/install-nix-action@v20
       with:
-        extra_nix_config: |
-          # save space on disk and in cache
-          auto-optimise-store = true
-          # keep all store paths necessary to build the outputs
-          keep-outputs = true
-          keep-derivations = true
           # Enable flakes
           experimental-features = nix-command flakes
           # Deploy tokens
           access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
-    - uses: actions/cache@v2
-      with:
-        key: nki-nix-${{ github.sha }}
-        restore-keys: |
-          nki-nix-
-        path: |
-          nix_store_dir
-          nix_store_db.sqlite
-    - name: restore cached nix store
-      run: |
-        if [ -e nix_store_db.sqlite ]; then
-          sudo systemctl stop nix-daemon
-          # put cached store paths back in their proper locations
-          sudo rm -rf /nix/store /nix/var/nix/db/db.sqlite
-          sudo mv nix_store_dir /nix/store
-          sudo cp nix_store_db.sqlite /nix/var/nix/db/db.sqlite
-          # fix store permissions
-          sudo chmod 1775 /nix/store
-          sudo chown root:nixbld /nix/store
-          sudo chmod 0644 /nix/var/nix/db/db.sqlite
-          sudo chown -R root:root /nix/store /nix/var/nix/db/db.sqlite
-          sudo systemctl start nix-daemon
-        fi
     - name: Deploy with deploy-rs
       env:
         SSH_AUTH_SOCK: /tmp/ssh_agent.sock
       run: |
         nix run -L github:Serokell/deploy-rs . -- --hostname ${{ secrets.INSTANCE_IP }} -- -L
-    - name: prepare nix store for caching
-      run: |
-        # delete old stuff not relevant to this build
-        nix store gc
-        sudo systemctl stop nix-daemon
-        # move store to a place where the cache action can read it
-        sudo mv /nix/store nix_store_dir
-        sudo mv /nix/var/nix/db/db.sqlite nix_store_db.sqlite