[llvm] Remove extra ';' outside of a function (NFC)

/llvm-project/llvm/lib/Support/Timer.cpp:565:74:
error: extra ';' outside of a function is incompatible with C++98 [-Werror,-Wc++98-compat-extra-semi]
static bool mtg::TrackSpace() { return ManagedTimerGlobals->TrackSpace; };
                                                                         ^
1 error generated.

Author: DamonFool

llvm/lib/Support/Timer.cpp

@@ -562,7 +562,7 @@ static std::string &mtg::LibSupportInfoOutputFilename() {
 static const std::string &mtg::InfoOutputFilename() {
   return ManagedTimerGlobals->InfoOutputFilename.getValue();
 }
-static bool mtg::TrackSpace() { return ManagedTimerGlobals->TrackSpace; };
+static bool mtg::TrackSpace() { return ManagedTimerGlobals->TrackSpace; }
 static bool mtg::SortTimers() { return ManagedTimerGlobals->SortTimers; }
 static SignpostEmitter &mtg::Signposts() {
   return ManagedTimerGlobals->Signposts();