revert: remove keystore password and gradle opts from CI workflow

.gitea/workflows/release.yml

@@ -8,8 +8,6 @@ on:
 jobs:
   build:
     runs-on: self-hosted
-    env:
-      GRADLE_OPTS: "-Xmx3g -Dorg.gradle.daemon=false -Dorg.gradle.parallel=false"
     steps:
       - name: Setup Node.js
         uses: actions/setup-node@v4
@@ -41,15 +39,6 @@ jobs:
         env:
           KEYSTORE_BASE64: ${{ secrets.KEYSTORE_BASE64 }}
 
-      - name: Create key.properties
-        run: |
-          cat > android/key.properties <<EOF
-          storePassword=Store_sc4l3
-          keyPassword=Store_sc4l3
-          keyAlias=siab
-          storeFile=../siab-release.keystore
-          EOF
-
       - name: Build App Bundle
         run: |
           flutter build appbundle \