SF bug #1067018: Obsolete info in Tutorial 9.1

Removed a section that is out of date after type/class unification.
While there was still some validity, the paragraph offered more
confusion that insight.

Doc/tut/tut.tex

@@ -3660,15 +3660,6 @@ make occasional use of Smalltalk and \Cpp{} terms.  (I would use Modula-3
 terms, since its object-oriented semantics are closer to those of
 Python than \Cpp, but I expect that few readers have heard of it.)
 
-I also have to warn you that there's a terminological pitfall for
-object-oriented readers: the word ``object'' in Python does not
-necessarily mean a class instance.  Like \Cpp{} and Modula-3, and
-unlike Smalltalk, not all types in Python are classes: the basic
-built-in types like integers and lists are not, and even somewhat more
-exotic types like files aren't.  However, \emph{all} Python types
-share a little bit of common semantics that is best described by using
-the word object.
-
 Objects have individuality, and multiple names (in multiple scopes)
 can be bound to the same object.  This is known as aliasing in other
 languages.  This is usually not appreciated on a first glance at