remove: drop Boss直聘 channel (non-functional) (#135)

Boss直聘 channel removed entirely — upstream mcp-bosszp
triggers account-level bans, making it unusable in practice.

Removed from: channel registry, README (CN/EN), install.md,
SKILL.md, tests, credits.

Co-authored-by: Panniantong <panniantong@users.noreply.github.com>

tests/test_channels.py

@@ -5,7 +5,6 @@ import shutil
 import subprocess
 
 from agent_reach.channels import get_all_channels, get_channel
-from agent_reach.channels.bosszhipin import BossZhipinChannel
 from agent_reach.channels.xiaohongshu import XiaoHongShuChannel
 
 
@@ -26,25 +25,6 @@ class TestChannelRegistry:
         assert "twitter" in names
 
 
-class TestBossZhipinChannel:
-    def test_reports_ok_when_configured_and_logged_in(self, monkeypatch):
-        monkeypatch.setattr(shutil, "which", lambda _: "/opt/homebrew/bin/mcporter")
-
-        def fake_run(cmd, **kwargs):
-            if cmd[:4] == ["/opt/homebrew/bin/mcporter", "config", "get", "bosszhipin"]:
-                return subprocess.CompletedProcess(cmd, 0, '{"name":"bosszhipin"}', "")
-            if cmd[:3] == ["/opt/homebrew/bin/mcporter", "call", "bosszhipin.get_login_info_tool"]:
-                return subprocess.CompletedProcess(cmd, 0, '{"is_logged_in": true}', "")
-            raise AssertionError(f"unexpected command: {cmd}")
-
-        monkeypatch.setattr(subprocess, "run", fake_run)
-
-        assert BossZhipinChannel().check() == (
-            "ok",
-            "完整可用（职位搜索、登录态检查、向 HR 打招呼）",
-        )
-
-
 class TestXiaoHongShuChannel:
     def test_reports_ok_when_server_health_is_ok(self, monkeypatch):
         monkeypatch.setattr(shutil, "which", lambda _: "/opt/homebrew/bin/mcporter")