Removes many fake idx entries.

These *fake* entries are not needed any more now that the table of
contents of documentation files appear in the index.

doc/tut2.txt

@@ -135,7 +135,7 @@ The ``EInvalidObjectConversion`` exception is raised if ``x`` is not a
 Object variants
 ---------------
 Often an object hierarchy is overkill in certain situations where simple
-`variant`:idx: types are needed.
+variant types are needed.
 
 An example:
 
@@ -182,7 +182,7 @@ bound to a class. This has disadvantages:
   ``join`` a string method or an array method?
 
 Nimrod avoids these problems by not assigning methods to a class. All methods
-in Nimrod are `multi-methods`:idx:. As we will see later, multi-methods are
+in Nimrod are multi-methods. As we will see later, multi-methods are
 distinguished from procs only for dynamic binding purposes.
 
 
@@ -194,7 +194,7 @@ The syntax ``obj.method(args)`` can be used instead of ``method(obj, args)``.
 If there are no remaining arguments, the parentheses can be omitted:
 ``obj.len`` (instead of ``len(obj)``).
 
-This `method call syntax`:idx: is not restricted to objects, it can be used
+This method call syntax is not restricted to objects, it can be used
 for any type:
 
 .. code-block:: nimrod
@@ -343,7 +343,7 @@ evaluation or dead code elimination do not work with methods.
 Exceptions
 ==========
 
-In Nimrod `exceptions`:idx: are objects. By convention, exception types are
+In Nimrod exceptions are objects. By convention, exception types are
 prefixed with an 'E', not 'T'. The `system <system.html>`_ module defines an
 exception hierarchy that you might want to stick to. Exceptions derive from
 E_Base, which provides the common interface.
@@ -380,7 +380,7 @@ the template ``newException`` in the ``system`` module can be used:
 Try statement
 -------------
 
-The `try`:idx: statement handles exceptions:
+The ``try`` statement handles exceptions:
 
 .. code-block:: nimrod
   # read the first two lines of a text file that should contain numbers
@@ -513,7 +513,7 @@ procs with the list of raised exceptions. You can read more about Nimrod's
 Generics
 ========
 
-`Generics`:idx: are Nimrod's means to parametrize procs, iterators or types
+Generics are Nimrod's means to parametrize procs, iterators or types
 with `type parameters`:idx:. They are most useful for efficient type safe
 containers:
 
@@ -714,9 +714,9 @@ know how the Nimrod concrete syntax is converted to an abstract syntax tree
 (AST). The AST is documented in the `macros <macros.html>`_ module.
 
 Once your macro is finished, there are two ways to invoke it:
-(1) invoking a macro like a procedure call (`expression macros`:idx:)
+(1) invoking a macro like a procedure call (expression macros)
 (2) invoking a macro with the special ``macrostmt``
-    syntax (`statement macros`:idx:)
+    syntax (statement macros)
 
 
 Expression Macros