Revert "Bug 2063759 - Avoid line-clamp style adjustment for displays that aren't block/inline. " for causing failures at webkit-line-clamp-016.html.

This reverts commit c0e30ee6b7d3a74774a61e1ff685cad2ef1aa72c.

gecko-commit: a2caac044137370923b8d150b21858dd70a80fc7
gecko-commit-git: b24081a77576ba0e451da29f42ab118b3f84a925
gecko-reviewers: firefox-style-system-reviewers, emilio, layout-reviewers

Author: Atila Butkovits