Revert "Support commutation check between Pauli-based gates and standard gates (#15488)" (#15906)

This reverts commit 3942c9c.

Author: Cryoris

crates/circuit/src/util.rs

@@ -47,12 +47,3 @@ pub const C_ONE: Complex64 = c64(1., 0.);
 pub const C_M_ONE: Complex64 = c64(-1., 0.);
 pub const IM: Complex64 = c64(0., 1.);
 pub const M_IM: Complex64 = c64(0., -1.);
-
-use std::f64::consts::{FRAC_PI_2, FRAC_PI_4, FRAC_PI_8, SQRT_2};
-pub const C_FRAC_PI_2: Complex64 = c64(FRAC_PI_2, 0.0);
-pub const C_FRAC_PI_4: Complex64 = c64(FRAC_PI_4, 0.0);
-pub const C_FRAC_PI_8: Complex64 = c64(FRAC_PI_8, 0.0);
-pub const C_FRAC_PI_2_SQRT_2: Complex64 = c64(FRAC_PI_2 / SQRT_2, 0.0);
-pub const C_M_FRAC_PI_4: Complex64 = c64(-FRAC_PI_4, 0.0);
-pub const C_M_FRAC_PI_8: Complex64 = c64(-FRAC_PI_8, 0.0);
-pub const C_M_FRAC_PI_2_SQRT_2: Complex64 = c64(-FRAC_PI_2 / SQRT_2, 0.0);

crates/pyext/src/lib.rs

@@ -72,7 +72,6 @@ fn _accelerate(m: &Bound<PyModule>) -> PyResult<()> {
     add_submodule(m, ::qiskit_transpiler::passes::sabre::sabre, "sabre")?;
     add_submodule(m, ::qiskit_accelerate::sampled_exp_val::sampled_exp_val, "sampled_exp_val")?;
     add_submodule(m, ::qiskit_quantum_info::sparse_observable::sparse_observable, "sparse_observable")?;
-    add_submodule(m, ::qiskit_quantum_info::sparse_observable::standard_generators::standard_generators, "standard_generators")?;
     add_submodule(m, ::qiskit_quantum_info::sparse_pauli_op::sparse_pauli_op, "sparse_pauli_op")?;
     add_submodule(m, ::qiskit_transpiler::passes::scheduling_mod, "scheduling")?;
     add_submodule(m, ::qiskit_quantum_info::unitary_sim::unitary_sim, "unitary_sim")?;

crates/quantum_info/src/sparse_observable/mod.rs

@@ -10,8 +10,6 @@
 // copyright notice, and modified files need to carry a notice indicating
 // that they have been altered from the originals.
 
-pub mod standard_generators;
-
 mod lookup;
 
 use hashbrown::HashSet;
@@ -4486,19 +4484,8 @@ fn coerce_to_observable<'py>(
         }
     }
 }
-#[pyfunction(name = "_generator_observable")]
-#[pyo3(signature = (gate, params = None))]
-pub fn generator_observable_py(
-    gate: qiskit_circuit::operations::StandardGate,
-    params: Option<Vec<qiskit_circuit::operations::Param>>,
-) -> Option<SparseObservable> {
-    let params = params.unwrap_or_default();
-    standard_generators::generator_observable(gate, &params)
-}
-
 pub fn sparse_observable(m: &Bound<PyModule>) -> PyResult<()> {
     m.add_class::<PySparseObservable>()?;
-    m.add_function(wrap_pyfunction!(generator_observable_py, m)?)?;
     Ok(())
 }