chore: kill unused tool (#23701)

packages/opencode/specs/effect/instance-context.md

@@ -224,7 +224,6 @@ These tools mostly use direct getters for path resolution and repo-relative disp
 - `src/tool/bash.ts`
 - `src/tool/edit.ts`
 - `src/tool/lsp.ts`
-- `src/tool/multiedit.ts`
 - `src/tool/plan.ts`
 - `src/tool/read.ts`
 - `src/tool/write.ts`

packages/opencode/specs/effect/schema.md

@@ -216,7 +216,6 @@ emitted JSON Schema must stay byte-identical.
 - [ ] `src/tool/grep.ts`
 - [ ] `src/tool/invalid.ts`
 - [ ] `src/tool/lsp.ts`
-- [ ] `src/tool/multiedit.ts`
 - [ ] `src/tool/plan.ts`
 - [ ] `src/tool/question.ts`
 - [ ] `src/tool/read.ts`

packages/opencode/specs/effect/tools.md

@@ -46,7 +46,6 @@ These exported tool definitions currently use `Tool.define(...)` in `src/tool`:
 - [x] `grep.ts`
 - [x] `invalid.ts`
 - [x] `lsp.ts`
-- [x] `multiedit.ts`
 - [x] `plan.ts`
 - [x] `question.ts`
 - [x] `read.ts`
@@ -82,7 +81,6 @@ Notable items that are already effectively on the target path and do not need se
 - `write.ts`
 - `codesearch.ts`
 - `websearch.ts`
-- `multiedit.ts`
 - `edit.ts`
 
 ## Filesystem notes