Remove the include of LineWidth.h from SimpleLineLayoutFunctions.cpp
<https://webkit.org/b/124449>

Reviewed by Antti Koivisto.

I removed the include of LineWidth, since SimpleLineLayoutFunctions.cpp doesn't use it.

No new tests, no behavior change.

* rendering/SimpleLineLayoutFunctions.cpp:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@159378 268f45cc-cd09-0410-ab3c-d52691b4dbfc