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

Thanks @bherbruck.

assets/locales/zh.json

@@ -305,22 +305,6 @@
   "cmd.browser_rename_group": "重命名组",
   "cmd.browser_ungroup": "取消编组",
   "cmd.browser_visibility": "显示/隐藏",
-  "cmd.cam_boundary_from_profile": "使用草图轮廓",
-  "cmd.cam_delete": "删除制造项目",
-  "cmd.cam_export": "导出 CAM 工件",
-  "cmd.cam_export_result": "获取 CAM 导出",
-  "cmd.cam_generate": "生成刀具路径",
-  "cmd.cam_holes_from_selection": "使用选定孔",
-  "cmd.cam_inspect": "检查制造",
-  "cmd.cam_job_cancel": "取消 CAM 作业",
-  "cmd.cam_job_status": "CAM 作业状态",
-  "cmd.cam_operation_order": "重新排序操作",
-  "cmd.cam_operation_put": "铣削操作",
-  "cmd.cam_post": "输出参考 G 代码",
-  "cmd.cam_program_put": "NC 程序",
-  "cmd.cam_setup_put": "铣削设置",
-  "cmd.cam_simulate": "模拟刀具路径",
-  "cmd.cam_tool_put": "刀具库",
   "cmd.canvas_calibrate": "校准画布",
   "cmd.canvas_decal": "贴花",
   "cmd.canvas_delete": "删除画布",
@@ -1129,7 +1113,6 @@
   "ui.heading_design": "设计",
   "ui.heading_draft": "拔模",
   "ui.heading_edit": "编辑",
-  "ui.heading_export": "导出",
   "ui.heading_extrude": "拉伸",
   "ui.heading_fillet": "圆角",
   "ui.heading_finish_sketch": "完成草图",
@@ -1142,7 +1125,6 @@
   "ui.heading_make": "制作",
   "ui.heading_measure": "测量",
   "ui.heading_mesh": "网格",
-  "ui.heading_milling": "铣削",
   "ui.heading_mirror": "镜像",
   "ui.heading_modify": "修改",
   "ui.heading_move": "移动",
@@ -1177,12 +1159,10 @@
   "ui.heading_surface": "曲面",
   "ui.heading_sweep": "扫掠",
   "ui.heading_thread": "螺纹",
-  "ui.heading_toolpaths": "刀具路径",
   "ui.heading_top": "上视",
   "ui.heading_torus": "圆环体",
   "ui.heading_utilities": "工具",
   "ui.heading_utility": "实用工具",
-  "ui.heading_verify": "验证",
   "ui.help": "帮助",
   "ui.hide": "隐藏",
   "ui.hideAxes": "隐藏轴",