[Polly] Delete unused lambda capture after 7175cffb2133048018df74c1b49d1d4962ea18f2

GitOrigin-RevId: 2213a354b9d1cc0153ac20367e5397c66e660c32
diff --git a/lib/Transform/ForwardOpTree.cpp b/lib/Transform/ForwardOpTree.cpp
index 56c5fef..141ac26 100644
--- a/lib/Transform/ForwardOpTree.cpp
+++ b/lib/Transform/ForwardOpTree.cpp
@@ -696,7 +696,7 @@
       }
     }
 
-    auto ExecAction = [this, TargetStmt, UseInst, DefStmt]() {
+    auto ExecAction = [this, TargetStmt, UseInst]() {
       // To ensure the right order, prepend this instruction before its
       // operands. This ensures that its operands are inserted before the
       // instruction using them.