Revert "add sqlite for restores"

This reverts commit 474184baa7.

.github/workflows/cache-merge.yml

@@ -29,8 +29,6 @@ jobs:
       - name: Install nix
         uses: https://github.com/DeterminateSystems/nix-installer-action@main
 
-      - run: nix profile install nixpkgs#sqlite
-
       - uses: nix-community/cache-nix-action@v6
         name: create and purge common cache
         with:
@@ -82,9 +80,7 @@ jobs:
       - name: Install nix
         uses: https://github.com/DeterminateSystems/nix-installer-action@main
 
-      - run: nix profile install nixpkgs#sqlite
-
       - name: Restore Nix store
-        uses: nix-community/cache-nix-action@v6
+      - uses: nix-community/cache-nix-action@v6
         with:
           primary-key: similar-cache-${{ matrix.os }}-common-${{ hashFiles('flake.lock') }}