ci: Remove redundant dep installation steps (#498)

## Description

This PR removes unnecessary steps from the `build-examples` workflow.

Author: MatiPl01

.github/workflows/build-examples.yml

@@ -35,10 +35,6 @@ jobs:
       - name: 📦 Install dependencies
         run: yarn install --immutable
 
-      - name: 🌐 Install Expo dependencies
-        working-directory: example/expo
-        run: yarn install --immutable
-
       - name: 📱 Install Expo CLI
         run: npm install -g @expo/cli
 
@@ -83,10 +79,6 @@ jobs:
       - name: 📦 Install dependencies
         run: yarn install --immutable
 
-      - name: 📱 Install dependencies for ${{ matrix.app }}
-        working-directory: example/${{ matrix.app }}
-        run: yarn install --immutable
-
       - name: 🍎 Setup Ruby (iOS only)
         if: matrix.platform == 'ios'
         uses: ruby/setup-ruby@v1
@@ -158,10 +150,6 @@ jobs:
       - name: 📦 Install dependencies
         run: yarn install --immutable
 
-      - name: 🌐 Install web dependencies
-        working-directory: example/web
-        run: yarn install --immutable
-
       - name: 🌐 Build web app
         working-directory: example/web
         run: yarn expo export -p web