remove integration test workflow

Author: tvpeter

.github/workflows/cont_integration.yml

@@ -89,48 +89,6 @@ jobs:
         run: cargo test ${{ matrix.features }} --doc --verbose
         continue-on-error: ${{ matrix.rust == 'nightly' }}
 
-  # Integration tests (requires Bitcoin node)
-  integration-test:
-    name: Integration Tests (${{ matrix.features }})
-    runs-on: ubuntu-latest
-    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
-    strategy:
-      matrix:
-        features:
-          - --all-features
-          - --no-default-features
-    steps:
-      - uses: actions/checkout@v4
-      
-      - name: Install Rust toolchain
-        uses: actions-rust-lang/setup-rust-toolchain@v1
-        with:
-          toolchain: stable
-          cache: true
-      
-      - name: Install Bitcoin Core 30.0
-        run: |
-          wget https://bitcoincore.org/bin/bitcoin-core-30.0/bitcoin-30.0-x86_64-linux-gnu.tar.gz
-          tar xzf bitcoin-30.0-x86_64-linux-gnu.tar.gz
-          sudo install -m 0755 -o root -g root -t /usr/local/bin bitcoin-30.0/bin/*
-      
-      - name: Start Bitcoin Core (regtest)
-        run: |
-          mkdir -p ~/.bitcoin
-          bitcoind -regtest -daemon -rpcuser=bitcoin -rpcpassword=bitcoin -rpcport=18443
-          sleep 5
-      
-      - name: Run integration tests
-        run: cargo test ${{ matrix.features }} --test integration -- --ignored --test-threads=1
-        env:
-          BITCOIN_RPC_URL: http://localhost:18443
-          BITCOIN_RPC_USER: bitcoin
-          BITCOIN_RPC_PASS: bitcoin
-      
-      - name: Stop Bitcoin Core
-        if: always()
-        run: bitcoin-cli -regtest -rpcuser=bitcoin -rpcpassword=bitcoin stop || true
-
   # MSRV
   msrv:
     name: MSRV