change to use notion external (#25)

external_plugins/linear/.mcp.json

@@ -1,6 +1,6 @@
 {
   "linear": {
-    "type": "sse",
-    "url": "https://mcp.linear.app/sse"
+    "type": "http",
+    "url": "https://mcp.linear.app/mcp"
   }
 }

external_plugins/notion/.claude-plugin/plugin.json

@@ -1,7 +0,0 @@
-{
-  "name": "notion",
-  "description": "Notion workspace integration. Search pages, create and update documents, manage databases, and access your team's knowledge base directly from Claude Code for seamless documentation workflows.",
-  "author": {
-    "name": "Notion"
-  }
-}

external_plugins/notion/.mcp.json

@@ -1,6 +0,0 @@
-{
-  "notion": {
-    "type": "sse",
-    "url": "https://mcp.notion.com/sse"
-  }
-}