Remove the doxyment for this now defunct parameter.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@139197 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/TextDiagnosticPrinter.cpp b/lib/Frontend/TextDiagnosticPrinter.cpp
index 976d3db..7206333 100644
--- a/lib/Frontend/TextDiagnosticPrinter.cpp
+++ b/lib/Frontend/TextDiagnosticPrinter.cpp
@@ -422,7 +422,6 @@
   /// \param Ranges The underlined ranges for this code snippet.
   /// \param NumRanges The number of unlined ranges.
   /// \param Hints The FixIt hints active for this diagnostic.
-  /// \param NumHints The number of hints active for this diagnostic.
   /// \param OnMacroInst The current depth of the macro expansion stack.
   void Emit(SourceLocation Loc,
             CharSourceRange *Ranges,