Remove a lot of unused imports

Signed-off-by: Daniel Narvaez <dwnarvaez@gmail.com>

src/sugar3/graphics/icon.py

@@ -32,7 +32,6 @@ from gi.repository import GdkPixbuf
 from gi.repository import Rsvg
 import cairo
 
-from sugar3.graphics import style
 from sugar3.graphics.xocolor import XoColor
 from sugar3.util import LRU
 

src/sugar3/graphics/palette.py

@@ -27,7 +27,6 @@ from gi.repository import Gtk
 from gi.repository import GObject
 from gi.repository import Pango
 
-from sugar3.graphics import palettegroup
 from sugar3.graphics import animator
 from sugar3.graphics import style
 from sugar3.graphics.icon import Icon

src/sugar3/graphics/palettemenu.py

@@ -14,8 +14,6 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
-import logging
-
 from gi.repository import GObject
 from gi.repository import Gtk
 from gi.repository import Pango

src/sugar3/graphics/style.py

@@ -26,7 +26,6 @@ import os
 import logging
 
 from gi.repository import Gdk
-from gi.repository import Gtk
 from gi.repository import Pango
 from gi.repository import GConf
 

src/sugar3/graphics/window.py

@@ -24,7 +24,6 @@ from gi.repository import GObject
 from gi.repository import Gdk
 from gi.repository import GdkX11
 from gi.repository import Gtk
-import warnings
 
 from sugar3.graphics.icon import Icon
 from sugar3.graphics import palettegroup