ci: remove no-op Jest unit-tests job

There are zero JS/TS test files in this repo, so the Jest job was
burning ~60-90s of CI time per run for nothing. Removed per reviewer
feedback — can re-add when JS/TS tests are introduced.

Co-authored-by: Claude <claude@anthropic.com>

Author: pavelzeman

.github/workflows/ci.yml

@@ -38,18 +38,6 @@ jobs:
       - run: npm ci
       - run: npm run typescript
 
-  unit-tests:
-    name: Unit Tests
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
-      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
-        with:
-          node-version: 22
-          cache: npm
-      - run: npm ci
-      - run: npm test -- --coverage --passWithNoTests
-
   kotlin-tests:
     name: Kotlin Tests
     runs-on: ubuntu-latest
@@ -67,7 +55,7 @@ jobs:
   build:
     name: Build Package
     runs-on: ubuntu-latest
-    needs: [lint, typescript, unit-tests, kotlin-tests]
+    needs: [lint, typescript, kotlin-tests]
     steps:
       - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
       - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4