fix(ci): remove unix tunnel references and fix Go version

- Remove protocol/tunnel/unix import (package not in community edition)
- Remove tunnel-unix CI job
- Fix nightly-release Go version from 1.18 to 1.21 (go.mod requires 1.20)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: M09Ic

.github/workflows/nightly-release.yml

@@ -34,7 +34,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.18
+          go-version: "1.21"
 
       - name: Set Version Info
         run: |

.github/workflows/test.yml

@@ -526,28 +526,6 @@ jobs:
         env:
           REM_TEST_ICMP: "1"
 
-  tunnel-unix:
-    name: "Tunnel: Unix domain socket"
-    runs-on: ubuntu-22.04
-    needs: [unit-tests]
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Set up Go
-        uses: actions/setup-go@v5
-        with:
-          go-version: "1.21"
-          cache: true
-
-      - name: Install gox
-        run: go install github.com/mitchellh/gox@latest
-
-      - name: Build Unix tunnel
-        run: bash build.sh -a "socks" -t "unix" -o "linux/amd64"
-
-      - name: Test Unix tunnel
-        run: go test -v -timeout 5m -run '^TestE2E_Unix' ./runner/
-
   tunnel-dns:
     name: "Tunnel: DNS (KCP over UDP)"
     runs-on: ubuntu-22.04

protocol/tunnel/registry_matrix_test.go

@@ -15,7 +15,6 @@ import (
 	_ "github.com/chainreactors/rem/protocol/tunnel/streamhttp"
 	_ "github.com/chainreactors/rem/protocol/tunnel/tcp"
 	_ "github.com/chainreactors/rem/protocol/tunnel/udp"
-	_ "github.com/chainreactors/rem/protocol/tunnel/unix"
 	_ "github.com/chainreactors/rem/protocol/tunnel/websocket"
 
 	"github.com/chainreactors/rem/protocol/core"
@@ -32,7 +31,6 @@ func TestRegisteredTunnelDialersConstruct(t *testing.T) {
 		{rawURL: "http2+raw://127.0.0.1:8443/rem?wrapper=raw", tunnelName: core.HTTP2Tunnel},
 		{rawURL: "streamhttp+raw://127.0.0.1:8080/rem?wrapper=raw", tunnelName: core.StreamHTTPTunnel},
 		{rawURL: "websocket+raw://127.0.0.1:8080/rem?wrapper=raw", tunnelName: core.WebSocketTunnel},
-		{rawURL: "unix+raw://127.0.0.1:0/rem?pipe=rem-test&wrapper=raw", tunnelName: core.UNIXTunnel},
 		{rawURL: "memory+socks://alice:secret@rem-pipe?wrapper=raw", tunnelName: core.MemoryTunnel},
 		{rawURL: "dns+raw://127.0.0.1:5353/rem?domain=test.local&wrapper=raw", tunnelName: core.DNSTunnel},
 		{rawURL: "icmp+raw://127.0.0.1:0/rem?wrapper=raw", tunnelName: core.ICMPTunnel},
@@ -63,7 +61,6 @@ func TestRegisteredTunnelListenersConstruct(t *testing.T) {
 		{rawURL: "http2+raw://127.0.0.1:8443/rem?wrapper=raw", tunnelName: core.HTTP2Tunnel},
 		{rawURL: "streamhttp+raw://127.0.0.1:8080/rem?wrapper=raw", tunnelName: core.StreamHTTPTunnel},
 		{rawURL: "websocket+raw://127.0.0.1:8080/rem?wrapper=raw", tunnelName: core.WebSocketTunnel},
-		{rawURL: "unix+raw://127.0.0.1:0/rem?pipe=rem-test&wrapper=raw", tunnelName: core.UNIXTunnel},
 		{rawURL: "memory+socks://alice:secret@rem-pipe?wrapper=raw", tunnelName: core.MemoryTunnel},
 		{rawURL: "dns+raw://127.0.0.1:5353/rem?domain=test.local&wrapper=raw", tunnelName: core.DNSTunnel},
 		{rawURL: "icmp+raw://127.0.0.1:0/rem?wrapper=raw", tunnelName: core.ICMPTunnel},

runner/e2e_test.go

@@ -46,7 +46,6 @@ import (
 	_ "github.com/chainreactors/rem/protocol/tunnel/streamhttp"
 	_ "github.com/chainreactors/rem/protocol/tunnel/tcp"
 	_ "github.com/chainreactors/rem/protocol/tunnel/udp"
-	_ "github.com/chainreactors/rem/protocol/tunnel/unix"
 	_ "github.com/chainreactors/rem/protocol/tunnel/websocket"
 	_ "github.com/chainreactors/rem/protocol/wrapper"
 	"github.com/chainreactors/rem/x/cryptor"