refactor(mcp): remove websearch_exa as built-in MCP server

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

src/mcp/index.ts

@@ -1,4 +1,3 @@
-import { websearch_exa } from "./websearch-exa"
 import { context7 } from "./context7"
 import { grep_app } from "./grep-app"
 import type { McpName } from "./types"
@@ -6,7 +5,6 @@ import type { McpName } from "./types"
 export { McpNameSchema, type McpName } from "./types"
 
 const allBuiltinMcps: Record<McpName, { type: "remote"; url: string; enabled: boolean }> = {
-  websearch_exa,
   context7,
   grep_app,
 }

src/mcp/types.ts

@@ -1,5 +1,5 @@
 import { z } from "zod"
 
-export const McpNameSchema = z.enum(["websearch_exa", "context7", "grep_app"])
+export const McpNameSchema = z.enum(["context7", "grep_app"])
 
 export type McpName = z.infer<typeof McpNameSchema>

src/mcp/websearch-exa.ts

@@ -1,5 +0,0 @@
-export const websearch_exa = {
-  type: "remote" as const,
-  url: "https://mcp.exa.ai/mcp?tools=web_search_exa",
-  enabled: true,
-}