Move GTK settings to non-git storage

The geometry updates are far too disrupting and I have no time to figure
out how (even if it's possible) to change config layout.

dotfiles/config/gtk-2.0/gtkfilechooser.ini

@@ -1,7 +0,0 @@
-[Filechooser Settings]
-StartupMode=cwd
-LocationMode=filename-entry
-ShowHidden=false
-ShowSizeColumn=true
-SortColumn=name
-SortOrder=ascending

dotfiles/config/gtk-3.0/gtk.css

@@ -1,6 +0,0 @@
-.scrollbar {
-  -GtkScrollbar-has-backward-stepper: true;
-  -GtkScrollbar-has-forward-stepper: true;
-  -GtkRange-slider-width: 20;
-  -GtkRange-stepper-size: 20;
-}

dotfiles/config/gtk-3.0/settings.ini

@@ -1,18 +0,0 @@
-[Settings]
-gtk-recent-files-enabled=0
-gtk-primary-button-warps-slider=false
-gtk-toolbar-icon-size=GTK_ICON_SIZE_SMALL_TOOLBAR
-#startup-mode=cwd
-gtk-theme-name=Mist
-gtk-icon-theme-name=Adwaita
-gtk-font-name=Sans 10
-gtk-cursor-theme-name=Adwaita
-gtk-cursor-theme-size=0
-gtk-toolbar-style=GTK_TOOLBAR_ICONS
-gtk-button-images=0
-gtk-menu-images=1
-gtk-enable-event-sounds=1
-gtk-enable-input-feedback-sounds=1
-gtk-xft-antialias=1
-gtk-xft-hinting=1
-gtk-xft-hintstyle=hintfull