MeasureIt: Missed needless from import in previous commit

Like the title says, AddonPreferences was called separately
Note: there is the import sys and os that should be maybe
removed, however that needs more checking
Sorry for the noise

measureit/__init__.py

@@ -55,12 +55,10 @@ else:
 # noinspection PyUnresolvedReferences
 import bpy
 from bpy.types import (
+        AddonPreferences,
         Scene,
         WindowManager,
         )
-from bpy.types import (
-        AddonPreferences,
-        )
 from bpy.props import (
         FloatVectorProperty,
         IntProperty,