Remove discussion to 'var' parameters.

Reviewed in person with Brian.

Deleted stale Radar FIXMEs -- these bugs have been closed as NTBF.

LanguageGuide/Closures.rst

@@ -129,18 +129,12 @@ Closure expression syntax has the following general form:
       <#statements#>
    }
 
-Closure expression syntax can use
-constant parameters, variable parameters, and ``inout`` parameters.
-Default values cannot be provided.
+The *parameters* in closure expression syntax
+can be ``inout`` parameters,
+but they can't have a default value.
 Variadic parameters can be used if you name the variadic parameter.
 Tuples can also be used as parameter types and return types.
 
-.. FIXME: the note about default values is tracked by rdar://16535452.
-   Remove this note if and when that Radar is fixed.
-
-.. FIXME: the note about variadic parameters requiring a name is tracked by rdar://16535434.
-   Remove this note if and when that Radar is fixed.
-
 .. QUESTION: is "reversed" the right name to use here?
    it's a backwards sort, not a reversed version of the original array
 

LanguageGuide/Subscripts.rst

@@ -149,8 +149,8 @@ Subscript Options
 Subscripts can take any number of input parameters,
 and these input parameters can be of any type.
 Subscripts can also return any type.
-Subscripts can use variable parameters and variadic parameters,
-but cannot use in-out parameters or provide default parameter values. 
+Subscripts can use variadic parameters,
+but they can't use in-out parameters or provide default parameter values.
 
 A class or structure can provide as many subscript implementations as it needs,
 and the appropriate subscript to be used will be inferred based on