From 1f4f98879fd6a66a8a774ce63df9090f300e45d3 Mon Sep 17 00:00:00 2001
From: Jake Lishman <jake.lishman@ibm.com>
Date: Thu, 21 Sep 2023 16:55:04 +0100
Subject: [PATCH] Remove spurious `SXGate._ARRAY`

This was left in only as a mistake during the writing of #10296;
originally the `with_gate_array` decorator didn't exist and all classes
had manual `_ARRAY` specifiers, but `SXGate`'s got left in accidentally
when all the rest were removed in favour of the decorator.
---
 qiskit/circuit/library/standard_gates/sx.py | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/qiskit/circuit/library/standard_gates/sx.py b/qiskit/circuit/library/standard_gates/sx.py
index 49fbb11c558c..7c1d58c0420d 100644
--- a/qiskit/circuit/library/standard_gates/sx.py
+++ b/qiskit/circuit/library/standard_gates/sx.py
@@ -146,10 +146,6 @@ class SXdgGate(SingletonGate):
                     = e^{-i pi/4} \sqrt{X}^{\dagger}
 
     """
-    _ARRAY = numpy.array(
-        [[0.5 - 0.5j, 0.5 + 0.5j], [0.5 + 0.5j, 0.5 - 0.5j]], dtype=numpy.complex128
-    )
-    _ARRAY.setflags(write=False)
 
     def __init__(self, label: Optional[str] = None, duration=None, unit=None, _condition=None):
         """Create new SXdg gate."""