scripted-diff: Remove priority_level from BENCHMARK macro

-BEGIN VERIFY SCRIPT-

 sed --in-place --regexp-extended 's/BENCHMARK\(([^,]+), benchmark::PriorityLevel::(HIGH|LOW)\)/BENCHMARK(\1)/g' $( git grep -l PriorityLevel )
 sed --in-place                   's/#define BENCHMARK(n, priority_level)/#define BENCHMARK(n)/g'                ./src/bench/bench.h

-END VERIFY SCRIPT-

src/bench/prevector.cpp

@@ -116,12 +116,12 @@ static void PrevectorFillVectorIndirect(benchmark::Bench& bench)
     {                                                                \
         Prevector##name<nontrivial_t>(bench);                        \
     }                                                                \
-    BENCHMARK(Prevector##name##Nontrivial, benchmark::PriorityLevel::HIGH);         \
+    BENCHMARK(Prevector##name##Nontrivial);         \
     static void Prevector##name##Trivial(benchmark::Bench& bench)    \
     {                                                                \
         Prevector##name<trivial_t>(bench);                           \
     }                                                                \
-    BENCHMARK(Prevector##name##Trivial, benchmark::PriorityLevel::HIGH);
+    BENCHMARK(Prevector##name##Trivial);
 
 PREVECTOR_TEST(Clear)
 PREVECTOR_TEST(Destructor)