Remove unused import

installsystems/database.py

@@ -7,8 +7,6 @@ Database stuff
 '''
 
 import os
-import shutil
-import cStringIO
 import sqlite3
 import installsystems.tools as istools
 import installsystems.template as istemplate

installsystems/printer.py

@@ -8,7 +8,6 @@ Install Systems Printer module
 
 import sys
 import os
-import signal
 import installsystems
 
 color = {

installsystems/repository.py

@@ -11,7 +11,6 @@ import time
 import shutil
 import pwd
 import grp
-import copy
 import tempfile
 import installsystems
 import installsystems.tools as istools