chore(actions): remove yarn audit

The audit is failing all our actions due to devDependencies in Lerna.
The audit doesn't provide us with any value and only makes the GitHub
Actions unreliable. Remove the yarn audit step, at least for now.

.github/workflows/pr_check.yml

@@ -26,10 +26,6 @@ jobs:
       - name: Install dependencies
         run: npx lerna bootstrap      
         
-      - name: Run audit
-        run: |
-          yarn audit
-
       - name: Run linting and tests
         run: |
           yarn lint

.github/workflows/release.yml

@@ -27,10 +27,6 @@ jobs:
       - name: Install dependencies
         run: npx lerna bootstrap
 
-      - name: Run audit
-        run: |
-          yarn audit
-
       - name: Run linting and tests
         run: |
           yarn lint