Debugger: remove unneeded check and assignment

If the inner type is null at this point it will also be null when
assigning the same type again.

Change-Id: I4dbad41a60d4853ac016adb54c693ce19d6f65d0
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

share/qtcreator/debugger/dumper.py

@@ -1295,8 +1295,6 @@ class DumperBase():
         innerType = arrayType.target()
         #self.warn("ARRAY TYPE: %s" % arrayType)
         #self.warn("INNER TYPE: %s" % innerType)
-        if innerType is None:
-            innerType = value.type.target()
 
         address = value.address()
         if address: