remove safe-chain action as its not available on ubuntu-runner

Author: wilf-pasq-scacap

.github/workflows/pr-checks.yml

@@ -19,7 +19,6 @@ jobs:
               uses: actions/setup-node@v3
               with:
                   node-version: 20
-            - uses: ScaCap/infra.gh-actions/ci/js/install-safe-chain@v1
             - name: Restore node_modules cache
               uses: actions/cache@v3
               with:
@@ -42,7 +41,6 @@ jobs:
               uses: actions/setup-node@v3
               with:
                   node-version: 20
-            - uses: ScaCap/infra.gh-actions/ci/js/install-safe-chain@v1
             - name: Restore node_modules cache
               uses: actions/cache@v3
               with:
@@ -70,7 +68,6 @@ jobs:
               uses: actions/setup-node@v3
               with:
                   node-version: 20
-            - uses: ScaCap/infra.gh-actions/ci/js/install-safe-chain@v1
             - name: Restore node_modules cache
               uses: actions/cache@v3
               with: