ci: skip vscode:prepublish #3536

Problem:
`vscode:prepublish` takes 2 minutes in each job, but this is
unnecessary. It's already tested by the `packageTestVsix.yml` CI job
(`npm run package`).

Solution:
Drop `vscode:prepublish` in all CI jobs except `packageTestVsix.yml`.

Author: justinmk3

.github/workflows/node.js.yml

@@ -27,7 +27,6 @@ jobs:
               with:
                   node-version: ${{ matrix.node-version }}
             - run: npm ci
-            - run: npm run vscode:prepublish
             - name: Tests
               uses: coactions/setup-xvfb@v1
               with:
@@ -70,7 +69,6 @@ jobs:
               with:
                   node-version: ${{ matrix.node-version }}
             - run: npm ci
-            - run: npm run vscode:prepublish
             - name: Tests
               run: npm test
             - name: Code coverage