fix a little problem with import keyword autocompletion

jedi/api.py

@@ -149,7 +149,6 @@ class Script(object):
                                r'(,|from)\s*$|import\s+$', completion_line):
                     completions += ((k, bs) for k
                                             in keywords.get_keywords('import'))
-                    u = None
 
             if not path and not isinstance(u, parsing.Import):
                 # add keywords

test/completion/imports.py

@@ -196,7 +196,7 @@ import datetime.
 #? []
 import datetime.date
 
-#? 18 ['mod1', 'random', 'pkg', 'rename1', 'rename2']
+#? 18 ['mod1', 'random', 'pkg', 'rename1', 'rename2', 'import']
 from import_tree. import pkg
 
 #? 18 ['pkg']