rocr: Remove redundant Refresh() call

The initial call to Refresh() in the constructor is
unnecessary as it's handled in Runtime::Load().

Signed-off-by: lyndonli <Lyndon.Li@amd.com>

runtime/hsa-runtime/core/util/flag.h

@@ -70,7 +70,7 @@ class Flag {
   const size_t DEFAULT_SCRATCH_SINGLE_LIMIT_ASYNC_PER_XCC = (3 * (1UL<<30));  // 3 GB
   const size_t DEFAULT_PCS_MAX_DEVICE_BUFFER_SIZE = (256 * (1UL<<20)); //256 MB
 
-  explicit Flag() { Refresh(); }
+  Flag() {}
 
   virtual ~Flag() {}