Remove hosted slack plugin stub

.claude-plugin/marketplace.json

@@ -1442,20 +1442,6 @@
         "sha": "b93007e9a726c6ee93c57a949e732744ef5acbfd"
       },
       "homepage": "https://github.com/zapier/zapier-mcp/tree/main/plugins/zapier"
-    },
-    {
-      "name": "zoom-plugin",
-      "description": "Claude plugin for planning, building, and debugging Zoom integrations across REST APIs, SDKs, webhooks, bots, and MCP workflows.",
-      "category": "development",
-      "author": {
-        "name": "Zoom"
-      },
-      "source": {
-        "source": "url",
-        "url": "https://github.com/zoom/zoom-plugin.git",
-        "sha": "57b70d01f40ee8043a634fdf384e4e92d6cab12f"
-      },
-      "homepage": "https://developers.zoom.us/"
     }
   ]
 }

external_plugins/slack/.claude-plugin/plugin.json

@@ -1,7 +0,0 @@
-{
-  "name": "slack",
-  "description": "Slack workspace integration. Search messages, access channels, read threads, and stay connected with your team's communications while coding. Find relevant discussions and context quickly.",
-  "author": {
-    "name": "Slack"
-  }
-}

external_plugins/slack/.mcp.json

@@ -1,10 +0,0 @@
-{
-  "slack": {
-    "type": "http",
-    "url": "https://mcp.slack.com/mcp",
-    "oauth": {
-      "clientId": "1601185624273.8899143856786",
-      "callbackPort": 3118
-    }
-  }
-}