doc: Sync classref with current source

doc/classes/Line2D.xml

@@ -72,7 +72,7 @@
 		<member name="begin_cap_mode" type="int" setter="set_begin_cap_mode" getter="get_begin_cap_mode" enum="Line2D.LineCapMode" default="0">
 			Controls the style of the line's first point. Use [enum LineCapMode] constants.
 		</member>
-		<member name="default_color" type="Color" setter="set_default_color" getter="get_default_color" default="Color( 0.4, 0.5, 1, 1 )">
+		<member name="default_color" type="Color" setter="set_default_color" getter="get_default_color" default="Color( 1, 1, 1, 1 )">
 			The line's color. Will not be used if a gradient is set.
 		</member>
 		<member name="end_cap_mode" type="int" setter="set_end_cap_mode" getter="get_end_cap_mode" enum="Line2D.LineCapMode" default="0">

doc/classes/Path2D.xml

@@ -15,7 +15,6 @@
 		<member name="curve" type="Curve2D" setter="set_curve" getter="get_curve">
 			A [Curve2D] describing the path.
 		</member>
-		<member name="self_modulate" type="Color" setter="set_self_modulate" getter="get_self_modulate" override="true" default="Color( 0.5, 0.6, 1, 0.7 )" />
 	</members>
 	<constants>
 	</constants>