docs: Remove redundant auth step in instructions

Author: masnwilliams

reference/mcp-server.mdx

@@ -108,7 +108,6 @@ Click [here](goose://extension?cmd=npx&arg=-y&arg=mcp-remote&arg=https%3A%2F%2Fm
 2. Select **HTTP (HTTP or Server-Sent Events)**.
 3. Enter: `https://mcp.onkernel.com/mcp`
 4. Name the server **Kernel** → Enter.
-5. Click **Allow** when asked to authenticate to mcp.onkernel.com.
 
 ### Windsurf