!3708 去掉docs\en\device-dev\faqs中多余的文档 faqs.md

Merge pull request !3708 from wusongqing/E0516

en/device-dev/faqs/faqs.md

-# FAQs
-
-
-
-- **[FAQs Overview](faqs-overview.md)**
-
-- **[Environment Setup](faqs-environment-setup.md)**
-
-- **[Compilation and Building Subsystem](faqs-building.md)**
-
-- **[Burning](faqs-burning.md)**
-
-- **[Kernel](faqs-kernel.md)**
-
-- **[Porting](faqs-porting.md)**
-
-- **[Startup](faqs-startup.md)**
-
-- **[System Applications](faqs-system-applications.md)**