remove unneeded assert

Created using spr 1.3.5-bogner

Author: MaskRay

clang/docs/ReleaseNotes.rst

@@ -431,7 +431,7 @@ Non-comprehensive list of changes in this release
   which allows them to be stored in STL containers.
 
 - In the ``-ftime-report`` output, the new "Clang time report" group replaces
-  the old "Clang front-end time report" and shows "Front end", "LLVM IR
+  the old "Clang front-end time report" and includes "Front end", "LLVM IR
   generation", "Optimizer", and "Machine code generation".
 
 New Compiler Flags

llvm/lib/Support/Timer.cpp

@@ -175,7 +175,6 @@ void Timer::clear() {
 }
 
 void Timer::yieldTo(Timer &O) {
-  assert(Running && "Cannot stop a paused timer");
   stopTimer();
   O.startTimer();
 }