[coco.core] Remove unused operator overloading (#2991)

This commit removes unused operator overloading in Shuffle.cpp.

Signed-off-by: Jonghyun Park <jh1302.park@samsung.com>

diff --git a/contrib/coco/core/src/IR/Shuffle.cpp b/contrib/coco/core/src/IR/Shuffle.cpp
index 6f8a9d2..f8007dd 100644 (file)
--- a/contrib/coco/core/src/IR/Shuffle.cpp
+++ b/contrib/coco/core/src/IR/Shuffle.cpp
@@ -16,18 +16,6 @@
 
 #include "coco/IR/Instrs.h"
 
-namespace
-{
-std::set<coco::Bag *> &operator+=(std::set<coco::Bag *> &res, coco::Bag *b)
-{
-  if (b != nullptr)
-  {
-    res.insert(b);
-  }
-  return res;
-}
-} // namespace
-
 namespace coco
 {