gtk2 dark theme wasn't working

Paper/gtk-2.0/dark.rc

@@ -129,7 +129,6 @@ style "dark" {
 
   # Draw frame around menu in a non-compositied environment
   # This needs to go before pixmap because we need to override some stuff
-  engine "adwaita" {}
 
   engine "pixmap" {
 

Paper/gtk-2.0/gtkrc

@@ -40,7 +40,7 @@ gtk-auto-mnemonics = 1
 gtk-primary-button-warps-slider = 1
 
 include "main.rc"
-include "dark.rc"
+# include "dark.rc"
 
 # App stylings
 include "apps/chrome.rc"
@@ -48,4 +48,4 @@ include "apps/gimp.rc"
 include "apps/libreoffice.rc"
 include "apps/terminal.rc"
 include "apps/thunar.rc"
-include "apps/xfce.rc"
+# include "apps/xfce.rc"

Paper/gtk-3.16/_common.scss

@@ -37,10 +37,6 @@ $button_transition: all 200ms $ease-out-quad;
 
   -GtkPaned-handle-size: 1;
 
-  // We use the outline properties to signal the focus properties
-  // to the adwaita engine: using real CSS properties is faster,
-  // and we don't use any outlines for now.
-
   // outline-color: transparentize($fg_color, 0.7);
   // outline-style: dashed;
   // outline-offset: -3px;