Revert "Manually install NDK"

This reverts commit 9c0b461e90.

.github/workflows/android-build-pr.yml

@@ -16,8 +16,6 @@ jobs:
         uses: actions/setup-java@v1
         with:
           java-version: 11
-      - name: Install non-automatically-fetched NDK
-        run: sdkmanager "ndk;21.0.6113669"
       - name: Create version name
         run: echo "VERSION_NAME=$(git describe --tags HEAD)" >> $GITHUB_ENV
       - name: Build forkRelease variant of app
@@ -39,8 +37,6 @@ jobs:
         uses: actions/setup-java@v1
         with:
           java-version: 11
-      - name: Install non-automatically-fetched NDK
-        run: sdkmanager "ndk;21.0.6113669"
       - name: Run tests
         uses: eskatos/gradle-command-action@v1
         with:
@@ -60,8 +56,6 @@ jobs:
         uses: actions/setup-java@v1
         with:
           java-version: 11
-      - name: Install non-automatically-fetched NDK
-        run: sdkmanager "ndk;21.0.6113669"
       - name: Run detekt
         uses: eskatos/gradle-command-action@v1
         with:
@@ -86,8 +80,6 @@ jobs:
         uses: actions/setup-java@v1
         with:
           java-version: 11
-      - name: Install non-automatically-fetched NDK
-        run: sdkmanager "ndk;21.0.6113669"
       - name: Run ktlint
         uses: eskatos/gradle-command-action@v1
         with:
@@ -107,8 +99,6 @@ jobs:
         uses: actions/setup-java@v1
         with:
           java-version: 11
-      - name: Install non-automatically-fetched NDK
-        run: sdkmanager "ndk;21.0.6113669"
       - name: Run lintDebug
         uses: eskatos/gradle-command-action@v1
         with: