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/Frontend/CompilerInstance.cpp b/clang/lib/Frontend/CompilerInstance.cpp
index 2ec8e8c..859560d 100644
--- a/clang/lib/Frontend/CompilerInstance.cpp
+++ b/clang/lib/Frontend/CompilerInstance.cpp
@@ -1042,7 +1042,7 @@
   return !getDiagnostics().getClient()->getNumErrors();
 }
 
-/// \brief Determine the appropriate source input kind based on language
+/// Determine the appropriate source input kind based on language
 /// options.
 static InputKind::Language getLanguageFromOptions(const LangOptions &LangOpts) {
   if (LangOpts.OpenCL)
@@ -1054,7 +1054,7 @@
   return LangOpts.CPlusPlus ? InputKind::CXX : InputKind::C;
 }
 
-/// \brief Compile a module file for the given module, using the options 
+/// Compile a module file for the given module, using the options 
 /// provided by the importing compiler instance. Returns true if the module
 /// was built without errors.
 static bool
@@ -1201,7 +1201,7 @@
   return FileMgr.getFile(PublicFilename);
 }
 
-/// \brief Compile a module file for the given module, using the options 
+/// Compile a module file for the given module, using the options 
 /// provided by the importing compiler instance. Returns true if the module
 /// was built without errors.
 static bool compileModuleImpl(CompilerInstance &ImportingInstance,
@@ -1350,7 +1350,7 @@
   }
 }
 
-/// \brief Diagnose differences between the current definition of the given
+/// Diagnose differences between the current definition of the given
 /// configuration macro and the definition provided on the command line.
 static void checkConfigMacro(Preprocessor &PP, StringRef ConfigMacro,
                              Module *Mod, SourceLocation ImportLoc) {
@@ -1408,13 +1408,13 @@
   }
 }
 
-/// \brief Write a new timestamp file with the given path.
+/// Write a new timestamp file with the given path.
 static void writeTimestampFile(StringRef TimestampFile) {
   std::error_code EC;
   llvm::raw_fd_ostream Out(TimestampFile.str(), EC, llvm::sys::fs::F_None);
 }
 
-/// \brief Prune the module cache of modules that haven't been accessed in
+/// Prune the module cache of modules that haven't been accessed in
 /// a long time.
 static void pruneModuleCache(const HeaderSearchOptions &HSOpts) {
   struct stat StatBuf;