Revert #1682 (three-axis milling) (#1715)

Thanks @bherbruck.

assets/locales/ja.json

@@ -305,22 +305,6 @@
   "cmd.browser_rename_group": "グループの名前を変更",
   "cmd.browser_ungroup": "グループ解除",
   "cmd.browser_visibility": "表示/非表示",
-  "cmd.cam_boundary_from_profile": "スケッチプロファイルを使用",
-  "cmd.cam_delete": "加工項目を削除",
-  "cmd.cam_export": "CAM 成果物をエクスポート",
-  "cmd.cam_export_result": "CAM 出力を取得",
-  "cmd.cam_generate": "工具経路を生成",
-  "cmd.cam_holes_from_selection": "選択した穴を使用",
-  "cmd.cam_inspect": "加工を確認",
-  "cmd.cam_job_cancel": "CAM ジョブをキャンセル",
-  "cmd.cam_job_status": "CAM ジョブの状態",
-  "cmd.cam_operation_order": "加工順序を変更",
-  "cmd.cam_operation_put": "切削加工",
-  "cmd.cam_post": "参照 G コードを出力",
-  "cmd.cam_program_put": "NC プログラム",
-  "cmd.cam_setup_put": "切削セットアップ",
-  "cmd.cam_simulate": "工具経路をシミュレーション",
-  "cmd.cam_tool_put": "工具ライブラリ",
   "cmd.canvas_calibrate": "キャンバスの尺度を設定",
   "cmd.canvas_decal": "デカール",
   "cmd.canvas_delete": "キャンバスを削除",
@@ -1129,7 +1113,6 @@
   "ui.heading_design": "デザイン",
   "ui.heading_draft": "勾配",
   "ui.heading_edit": "編集",
-  "ui.heading_export": "出力",
   "ui.heading_extrude": "押し出し",
   "ui.heading_fillet": "フィレット",
   "ui.heading_finish_sketch": "スケッチを終了",
@@ -1142,7 +1125,6 @@
   "ui.heading_make": "製造",
   "ui.heading_measure": "計測",
   "ui.heading_mesh": "メッシュ",
-  "ui.heading_milling": "切削",
   "ui.heading_mirror": "ミラー",
   "ui.heading_modify": "修正",
   "ui.heading_move": "移動",
@@ -1177,12 +1159,10 @@
   "ui.heading_surface": "サーフェス",
   "ui.heading_sweep": "スイープ",
   "ui.heading_thread": "ねじ",
-  "ui.heading_toolpaths": "工具経路",
   "ui.heading_top": "上面",
   "ui.heading_torus": "トーラス",
   "ui.heading_utilities": "ユーティリティ",
   "ui.heading_utility": "ユーティリティ",
-  "ui.heading_verify": "検証",
   "ui.help": "ヘルプ",
   "ui.hide": "非表示",
   "ui.hideAxes": "軸を非表示",