Remove \brief commands from doxygen comments.

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

Differential Revision: https://reviews.llvm.org/D46290

llvm-svn: 331272
diff --git a/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.h b/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.h
index e16c035..395a6e3 100644
--- a/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.h
+++ b/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.h
@@ -48,7 +48,7 @@
 class MCSymbol;
 class MachineFunction;
 
-/// \brief Collects and handles line tables information in a CodeView format.
+/// Collects and handles line tables information in a CodeView format.
 class LLVM_LIBRARY_VISIBILITY CodeViewDebug : public DebugHandlerBase {
   MCStreamer &OS;
   BumpPtrAllocator Allocator;
@@ -379,10 +379,10 @@
   unsigned getPointerSizeInBytes();
 
 protected:
-  /// \brief Gather pre-function debug information.
+  /// Gather pre-function debug information.
   void beginFunctionImpl(const MachineFunction *MF) override;
 
-  /// \brief Gather post-function debug information.
+  /// Gather post-function debug information.
   void endFunctionImpl(const MachineFunction *) override;
 
 public:
@@ -390,10 +390,10 @@
 
   void setSymbolSize(const MCSymbol *, uint64_t) override {}
 
-  /// \brief Emit the COFF section that holds the line table information.
+  /// Emit the COFF section that holds the line table information.
   void endModule() override;
 
-  /// \brief Process beginning of an instruction.
+  /// Process beginning of an instruction.
   void beginInstruction(const MachineInstr *MI) override;
 };