Remove \brief commands from doxygen comments.

This is similar to the LLVM change https://reviews.llvm.org/D46290.

We've been running doxygen with the autobrief option for a couple of
years now. This makes the \brief markers into our comments
redundant. Since they are a visual distraction and we don't want to
encourage more \brief markers in new code either, this patch removes
them all.

Patch produced by

for i in $(git grep -l '\@brief'); do perl -pi -e 's/\@brief //g' $i & done
for i in $(git grep -l '\\brief'); do perl -pi -e 's/\\brief //g' $i & done

Differential Revision: https://reviews.llvm.org/D46320

llvm-svn: 331834
diff --git a/clang/lib/AST/CXXInheritance.cpp b/clang/lib/AST/CXXInheritance.cpp
index 9314cfd..374ddac 100644
--- a/clang/lib/AST/CXXInheritance.cpp
+++ b/clang/lib/AST/CXXInheritance.cpp
@@ -34,7 +34,7 @@
 
 using namespace clang;
 
-/// \brief Computes the set of declarations referenced by these base
+/// Computes the set of declarations referenced by these base
 /// paths.
 void CXXBasePaths::ComputeDeclsFound() {
   assert(NumDeclsFound == 0 && !DeclsFound &&
@@ -76,7 +76,7 @@
   DetectedVirtual = nullptr;
 }
 
-/// @brief Swaps the contents of this CXXBasePaths structure with the
+/// Swaps the contents of this CXXBasePaths structure with the
 /// contents of Other.
 void CXXBasePaths::swap(CXXBasePaths &Other) {
   std::swap(Origin, Other.Origin);
@@ -567,11 +567,11 @@
 namespace {
 
 class FinalOverriderCollector {
-  /// \brief The number of subobjects of a given class type that
+  /// The number of subobjects of a given class type that
   /// occur within the class hierarchy.
   llvm::DenseMap<const CXXRecordDecl *, unsigned> SubobjectCount;
 
-  /// \brief Overriders for each virtual base subobject.
+  /// Overriders for each virtual base subobject.
   llvm::DenseMap<const CXXRecordDecl *, CXXFinalOverriderMap *> VirtualOverriders;
 
   CXXFinalOverriderMap FinalOverriders;