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/Transforms/Utils/CodeExtractor.cpp b/llvm/lib/Transforms/Utils/CodeExtractor.cpp
index 573ccc3..fe82e0a 100644
--- a/llvm/lib/Transforms/Utils/CodeExtractor.cpp
+++ b/llvm/lib/Transforms/Utils/CodeExtractor.cpp
@@ -78,7 +78,7 @@
 AggregateArgsOpt("aggregate-extracted-args", cl::Hidden,
                  cl::desc("Aggregate arguments to code-extracted functions"));
 
-/// \brief Test whether a block is valid for extraction.
+/// Test whether a block is valid for extraction.
 bool CodeExtractor::isBlockValidForExtraction(const BasicBlock &BB,
                                               bool AllowVarArgs) {
   // Landing pads must be in the function where they were inserted for cleanup.
@@ -130,7 +130,7 @@
   return true;
 }
 
-/// \brief Build a set of blocks to extract if the input blocks are viable.
+/// Build a set of blocks to extract if the input blocks are viable.
 static SetVector<BasicBlock *>
 buildExtractionBlockSet(ArrayRef<BasicBlock *> BBs, DominatorTree *DT,
                         bool AllowVarArgs) {