remove unused imports

pfb/operators/gridder.py

@@ -9,12 +9,10 @@
 import numba
 import concurrent.futures as cf
 import xarray as xr
-import dask
 import dask.array as da
 from ducc0.wgridder.experimental import vis2dirty, dirty2vis
-from ducc0.fft import c2r, r2c, c2c
+from ducc0.fft import r2c
 from ducc0.misc import resize_thread_pool
-from africanus.constants import c as lightspeed
 from pfb.utils.weighting import counts_to_weights, _compute_counts
 from pfb.utils.beam import eval_beam
 from pfb.utils.naming import xds_from_list

pfb/operators/hessian.py

@@ -1,12 +1,9 @@
 from functools import partial
 import numpy as np
 import numexpr as ne
-import dask
-import dask.array as da
 from ducc0.wgridder.experimental import vis2dirty, dirty2vis
 from ducc0.fft import r2c, c2r
 from ducc0.misc import empty_noncritical
-from uuid import uuid4
 from pfb.operators.psf import (psf_convolve_slice,
                                psf_convolve_cube)
 from pfb.opt.pcg import pcg

pfb/operators/psf.py

@@ -1,11 +1,7 @@
 import numpy as np
-import numexpr as ne
 import dask.array as da
 from uuid import uuid4
-from ducc0.fft import r2c, c2r, c2c, good_size
-from ducc0.misc import roll_resize_roll as rrr
-from uuid import uuid4
-import gc
+from ducc0.fft import r2c, c2r
 
 
 def psf_convolve_slice(

pfb/operators/psi.py

@@ -5,9 +5,7 @@
 from numba import types, typed
 from numba.experimental import jitclass
 import pywt
-from scipy.datasets import ascent
 from pfb.wavelets import coeff_size, signal_size, dwt2d, idwt2d, copyT
-from time import time
 
 
 @numba.njit

pfb/opt/pcg.py

@@ -5,12 +5,10 @@
 import numexpr as ne
 from functools import partial
 import dask.array as da
-from distributed import wait
 from uuid import uuid4
-from pfb.utils.misc import norm_diff, fitcleanbeam, Gaussian2D, taperf, JIT_OPTIONS
+from pfb.utils.misc import norm_diff, JIT_OPTIONS
 from pfb.utils.naming import xds_from_list
 from ducc0.misc import empty_noncritical
-from ducc0.fft import c2c
 iFs = np.fft.ifftshift
 Fs = np.fft.fftshift