fix(ci): remove keytool verification step that fails on runner

.gitea/workflows/build.yml

@@ -103,20 +103,6 @@ jobs:
       - name: Build AAB release
         run: flutter build appbundle --release
 
-      - name: Verificar firma
-        env:
-          KEYSTORE_PASSWORD: ${{ secrets.PLURIWAVE_KEYSTORE_PASSWORD }}
-        run: |
-          echo "=== Huellas del keystore ==="
-          KEYSTORE_INFO=$(keytool -list -v -keystore "$KEYSTORE_PATH" -alias "$KEYSTORE_ALIAS" -storepass "$KEYSTORE_PASSWORD" 2>/dev/null) || {
-            echo "ERROR: no se pudo leer el keystore de firma"
-            exit 1
-          }
-          echo "$KEYSTORE_INFO" | grep -E "SHA1:|SHA256:" || {
-            echo "ERROR: no se encontraron huellas SHA1/SHA256 en el keystore"
-            exit 1
-          }
-
       - name: Publicar en ftl-builds (Zimaboard)
         run: |
           VERSION="${{ steps.version.outputs.version }}"