Remove more storybook leftovers (#60337)

Release Notes:

- N/A

.github/CODEOWNERS.hold

@@ -304,7 +304,6 @@
 /crates/picker/ @zed-industries/ui-team
 /crates/refineable/ @zed-industries/ui-team
 /crates/story/ @zed-industries/ui-team
-/crates/storybook/ @zed-industries/ui-team
 /crates/svg_preview/ @zed-industries/ui-team
 /crates/tab_switcher/ @zed-industries/ui-team
 /crates/theme/ @zed-industries/ui-team

assets/keymaps/storybook.json

@@ -1,33 +0,0 @@
-[
-  // Standard macOS bindings
-  {
-    "bindings": {
-      "home": "menu::SelectFirst",
-      "shift-pageup": "menu::SelectFirst",
-      "pageup": "menu::SelectFirst",
-      "cmd-up": "menu::SelectFirst",
-      "end": "menu::SelectLast",
-      "shift-pagedown": "menu::SelectLast",
-      "pagedown": "menu::SelectLast",
-      "cmd-down": "menu::SelectLast",
-      "tab": "menu::SelectNext",
-      "ctrl-n": "menu::SelectNext",
-      "down": "menu::SelectNext",
-      "shift-tab": "menu::SelectPrevious",
-      "ctrl-p": "menu::SelectPrevious",
-      "up": "menu::SelectPrevious",
-      "enter": "menu::Confirm",
-      "ctrl-enter": "menu::SecondaryConfirm",
-      "cmd-enter": "menu::SecondaryConfirm",
-      "ctrl-escape": "menu::Cancel",
-      "cmd-escape": "menu::Cancel",
-      "ctrl-c": "menu::Cancel",
-      "escape": "menu::Cancel",
-      "cmd-q": "storybook::Quit",
-      "backspace": "editor::Backspace",
-      "delete": "editor::Delete",
-      "left": "editor::MoveLeft",
-      "right": "editor::MoveRight",
-    },
-  },
-]

script/check-keymaps

@@ -5,7 +5,6 @@ set -euo pipefail
 pattern='cmd-'
 result=$(git grep --no-color --line-number --fixed-strings -e "$pattern" -- \
   'assets/keymaps/' \
-  ':(exclude)assets/keymaps/storybook.json' \
   ':(exclude)assets/keymaps/default-macos.json' \
   ':(exclude)assets/keymaps/specific-overrides-macos.json' \
   ':(exclude)assets/keymaps/macos/*.json' || true)

script/storybook

@@ -1,7 +0,0 @@
-#!/usr/bin/env bash
-
-if [ -z "$1" ]; then
-    cargo run -p storybook
-else
-    cargo run -p storybook -- "components/$1"
-fi