Remove xdsl-plugin entry point from setup.py (#2278)

**Context:**
We need to remove xdsl entry point form Catalyst as we no longer need to
use the plugin route to apply xdsl passes.

**Description of the Change:**

**Benefits:**

**Possible Drawbacks:**

**Related GitHub Issues:**
[sc-103076]

Author: mehrdad2m

frontend/test/pytest/python_interface/transforms/quantum/test_xdsl_diagonalize_measurements.py

@@ -24,7 +24,6 @@
 
 import pennylane as qml
 
-from catalyst.passes import apply_pass
 from catalyst.python_interface.transforms import (
     DiagonalizeFinalMeasurementsPass,
     diagonalize_final_measurements_pass,
@@ -447,6 +446,7 @@ def circuit(x):
             _ = circuit(0.7)
 
 
+@pytest.mark.usefixtures("use_capture")
 class TestDiagonalizeFinalMeasurementsCatalystFrontend:
     """Integration tests going through the catalyst frontend (program capture disabled)"""
 
@@ -484,7 +484,7 @@ def circuit_ref(phi):
         ), "Sanity check failed, is expected_res correct?"
 
         circuit_compiled = qml.qjit(
-            apply_pass("catalyst_xdsl_plugin.diagonalize-final-measurements")(circuit_ref),
+            diagonalize_final_measurements_pass(circuit_ref),
         )
 
         np.allclose(expected_res(angle), circuit_compiled(angle))
@@ -516,7 +516,7 @@ def expected_res(x, y):
         ), "Sanity check failed, is expected_res correct?"
 
         circuit_compiled = qml.qjit(
-            apply_pass("catalyst_xdsl_plugin.diagonalize-final-measurements")(circuit_ref),
+            diagonalize_final_measurements_pass(circuit_ref),
         )
 
         assert np.allclose(expected_res(phi, theta), circuit_compiled(phi, theta))
@@ -544,7 +544,7 @@ def expected_res(x, y):
         ), "Sanity check failed, is expected_res correct?"
 
         circuit_compiled = qml.qjit(
-            apply_pass("catalyst_xdsl_plugin.diagonalize-final-measurements")(circuit_ref),
+            diagonalize_final_measurements_pass(circuit_ref),
         )
 
         assert np.allclose(expected_res(phi, theta), circuit_compiled(phi, theta))
@@ -556,7 +556,7 @@ def test_overlapping_observables_raises_error(self):
         dev = qml.device("lightning.qubit", wires=2)
 
         @qml.qjit()
-        @apply_pass("catalyst_xdsl_plugin.diagonalize-final-measurements")
+        @diagonalize_final_measurements_pass
         @qml.qnode(dev)
         def circuit(x):
             qml.RX(x, 0)
@@ -574,7 +574,7 @@ def test_non_commuting_observables_raise_error(self):
         dev = qml.device("lightning.qubit", wires=1)
 
         @qml.qjit()
-        @apply_pass("catalyst_xdsl_plugin.diagonalize-final-measurements")
+        @diagonalize_final_measurements_pass
         @qml.qnode(dev)
         def circuit(x):
             qml.RX(x, 0)

frontend/test/pytest/test_mlir_plugin_interface.py

@@ -94,16 +94,3 @@ def test_get_options():
         assert isinstance(options, dict)
         assert isinstance(options["option"], ir.BoolAttr)
         assert options["option"].value == True
-
-
-@pytest.mark.skip(reason="xdsl not installed in ci cd yet")
-def test_xdsl_plugin():
-    """Here, we just test that we are able to run."""
-
-    @catalyst.qjit
-    @catalyst.passes.apply_pass("catalyst_xdsl_plugin.cancel-inverses")
-    @qml.qnode(qml.device("null.qubit", wires=1))
-    def example():
-        return qml.state()
-
-    example()

setup.py

@@ -147,7 +147,6 @@ def parse_dep_versions():
         "cuda_quantum.ops = catalyst.api_extensions",
         "cuda_quantum.qjit = catalyst.third_party.cuda:cudaqjit",
     ],
-    "catalyst.passes_resolution": ["catalyst_xdsl_plugin.passes = catalyst.passes.xdsl_plugin"],
 }
 
 classifiers = [