Remove "-runStyle HtmlUnit:FF3.6" for coverage tests

Support for HtmlUnit's support for FF3.6 was removed when we upgraded
to a newer version of HtmlUnit, and -runStyle HtmlUnit:FF17 is the
default behavior anyway when a run style is not explicitly specified.

Change-Id: Ic2af8dbe040f13c01c21e06606de283535a1581d
1 file changed