Remove unused MAX_CONCURRENCY variable

Author: pervazea

src/common/init.cpp

@@ -35,7 +35,6 @@ void PelotonInit::Initialize() {
   LOGGING_THREAD_COUNT = 1;
   GC_THREAD_COUNT = 1;
   EPOCH_THREAD_COUNT = 1;
-  MAX_CONCURRENCY = 10;
 
   // set max thread number.
   thread_pool.Initialize(0, std::thread::hardware_concurrency() + 3);

src/common/internal_types.cpp

@@ -37,7 +37,6 @@ size_t CONNECTION_THREAD_COUNT = 1;
 size_t LOGGING_THREAD_COUNT = 1;
 size_t GC_THREAD_COUNT = 1;
 size_t EPOCH_THREAD_COUNT = 1;
-size_t MAX_CONCURRENCY = 10;
 
 //===--------------------------------------------------------------------===//
 // DatePart <--> String Utilities

src/include/common/internal_types.h

@@ -1160,7 +1160,6 @@ extern size_t CONNECTION_THREAD_COUNT;
 extern size_t LOGGING_THREAD_COUNT;
 extern size_t GC_THREAD_COUNT;
 extern size_t EPOCH_THREAD_COUNT;
-extern size_t MAX_CONCURRENCY;
 
 //===--------------------------------------------------------------------===//
 // TupleMetadata