[INSTALL.md] added removal steps for ots zip archive file and archive directory
[INSTALL.md] added removal steps for ots zip archive file and archive directory


moyogo/fontbakery,moyogo/fontbakery,googlefonts/fontbakery,graphicore/fontbakery,graphicore/fontbakery,googlefonts/fontbakery,graphicore/fontbakery,moyogo/fontbakery,googlefonts/fontbakery