diff --git a/releasenotes/add-aer-densitymatrix-959c261c954fa60e.yaml b/releasenotes/add-aer-densitymatrix-959c261c954fa60e.yaml
deleted file mode 100644
index 1fccca7dbc..0000000000
--- a/releasenotes/add-aer-densitymatrix-959c261c954fa60e.yaml
+++ /dev/null
@@ -1,6 +0,0 @@
----
-features:
-  - |
-    Add AerDensityMatrix class that allows faster Aer simulation for density
-    matrix. Roughly speaking, this is a counterpart of AerStatevector which
-    is for state vector.