Don't uninstall typescript before npm ci in GHA (#50062)

.github/workflows/ci.yml

@@ -31,10 +31,6 @@ jobs:
       with:
         node-version: ${{ matrix.node-version }}
         check-latest: true
-    - name: Remove existing TypeScript
-      run: |
-        npm uninstall typescript --no-save
-        npm uninstall tslint --no-save
     - run:  npm ci
 
     # Re: https://github.com/actions/setup-node/pull/125

.github/workflows/release-branch-artifact.yaml

@@ -12,10 +12,6 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - uses: actions/setup-node@v3
-    - name: Remove existing TypeScript
-      run: |
-        npm uninstall typescript --no-save
-        npm uninstall tslint --no-save
     - name: npm install and test
       run: |
         npm ci