SemaTemplateDeduction.cpp: Prune two obsolete descriptions. [-Wdocumentation]

* getMostSpecialized()

/// \param Index if non-NULL and the result of this function is non-nULL,
/// receives the index corresponding to the resulting function template
/// specialization.

* DeduceTemplateArguments()

/// \param Name the name of the function being called. This is only significant
/// when the function template is a conversion function template, in which
/// case this routine will also perform template argument deduction based on
/// the function to which

llvm-svn: 167909