Remove needs_conversion flag from text-wrap-mode and white-space-collapse properties (#147)

Signed-off-by: Nico Burns <[email protected]>

Author: nicoburns

style/properties/longhands/inherited_text.mako.rs

@@ -147,7 +147,6 @@ ${helpers.single_keyword(
     gecko_aliases="-moz-pre-space=preserve-spaces",
     engines="gecko servo",
     gecko_enum_prefix="StyleWhiteSpaceCollapse",
-    needs_conversion="True",
     animation_type="discrete",
     spec="https://drafts.csswg.org/css-text-4/#propdef-white-space-collapse",
     servo_restyle_damage="rebuild_and_reflow",
@@ -382,7 +381,6 @@ ${helpers.single_keyword(
     "wrap nowrap",
     engines="gecko servo",
     gecko_enum_prefix="StyleTextWrapMode",
-    needs_conversion="True",
     animation_type="discrete",
     spec="https://drafts.csswg.org/css-text-4/#propdef-text-wrap-mode",
     servo_restyle_damage="rebuild_and_reflow",