This commit fixes some typos in the Tempest Test Removal Procedure
document. The document was introduced by just copying from the wiki page
to this repo[1]. So we didn't paying attention at that time.
[1] I5f2322a5de7b73252e0162165eeaec120ec94948
Change-Id: Ia3b4f255cc688ddd4007cf80753923cb18799b98