Stop using unico for current theme (not useable on gtk 3.16 and newer)

debian/control

@@ -25,7 +25,6 @@ Architecture: all
 Depends: gtk2-engines,
          gtk2-engines-pixbuf,
          gtk2-engines-murrine,
-         gtk3-engines-unico,
          libnewt0.52 (>= 0.52.11-2ubuntu7),
          ${misc:Depends}
 Description: artwork for Lubuntu - 16.10 version

src/usr/share/themes/Lubuntu-default/gtk-3.0/gtk-lubuntu.css

@@ -86,10 +86,6 @@
 	border-width: 1px 0 1px 0;
 	padding: 2px;
 	color: @toolbar_fg_color;
-	-unico-border-gradient: none;
-	-unico-inner-stroke-gradient: none;
-	-unico-inner-stroke-top-color: @transparent;
-	-unico-inner-stroke-width: 0;
 }
 
 
@@ -107,10 +103,6 @@
 .primary-toolbar .separator:insensitive {
 	border-color: alpha (shade (@toolbar_bg_color, 0.9), 0.5);
 	border-style: solid;
-
-	-unico-border-gradient: none;
-	-unico-inner-stroke-color: alpha (shade (@toolbar_bg_color, 1.26), 0.4);
-	-unico-inner-stroke-gradient: none;
 }
 
 /* primary-toolbar */

src/usr/share/themes/Lubuntu-default/gtk-3.20/gtk-lubuntu.css

@@ -86,10 +86,6 @@
 	border-width: 1px 0 1px 0;
 	padding: 2px;
 	color: @toolbar_fg_color;
-	-unico-border-gradient: none;
-	-unico-inner-stroke-gradient: none;
-	-unico-inner-stroke-top-color: @transparent;
-	-unico-inner-stroke-width: 0;
 }
 
 
@@ -107,10 +103,6 @@
 .primary-toolbar .separator:disabled {
 	border-color: alpha (shade (@toolbar_bg_color, 0.9), 0.5);
 	border-style: solid;
-
-	-unico-border-gradient: none;
-	-unico-inner-stroke-color: alpha (shade (@toolbar_bg_color, 1.26), 0.4);
-	-unico-inner-stroke-gradient: none;
 }
 
 /* primary-toolbar */