Remove redundant memory management initialization (facebookincubator#…

…10426)

Summary:
Pull Request resolved: facebookincubator#10426

MemoryManager initalization was moved up further in the code but the original placement wasn't removed

Reviewed By: kevinwilfong

Differential Revision: D59545365

velox/exec/tests/AggregationRunnerTest.cpp

@@ -75,7 +75,6 @@ int main(int argc, char** argv) {
 
   facebook::velox::aggregate::prestosql::registerAllAggregateFunctions();
   facebook::velox::functions::prestosql::registerAllScalarFunctions();
-  // facebook::velox::memory::MemoryManager::initialize({});
 
   auto duckQueryRunner =
       std::make_unique<facebook::velox::exec::test::DuckQueryRunner>();