Revert "docs(guide/unit-testing): correct link"

This reverts commit 1e4f436d92b7e959e925531fbd26e78818514360.
Revert "docs(error/index): add header"

This reverts commit f57b6dec8724f3e024c7d40c86347302bcfad852.
Revert "docs(misc/index): add header; general links"

This reverts commit fc775a1614f9a3d429d23b0c2b97e4647c8e1b21.
Revert "docs(misc/started): add header"

This reverts commit c3ae125520057ccf5f4038265d430ea00da0730e.
Revert "chore(docs): remove unneeded Bootstrap/jQuery files from distribution"

This reverts commit 64c8698f6c2df785ba98d0b04f42d8bcd6466aa9.