Remove SWFFT, FFTW, and heFFTe tutorials and documentation (#141)

* remove SWFFT, FFTW, and heFFTe tutorials and documentation; they are superceded by amrex::FFT

* fix broken figure

Author: ajnonaka

Docs/source/FFTW_Tutorial.rst

@@ -34,7 +34,7 @@ as I am aware, the code works for any AMReX grid structure. Details of how to bu
 
 The figure below shows one possible grid structure of the 2D (red grid) and 3D (multicolored blocks) setup.
 
-.. |a| image:: ./SWFFT/iface_rect.png
+.. |a| image:: ./figs/iface_rect.png
                :width: 60%
 
 .. table::

Docs/source/MUI_Tutorial.rst

@@ -46,10 +46,8 @@ sorted by the following categories:
   and analysis tool.
 - :ref:`EB<tutorials_eb>`  -- Examples of embedded boundaries.
 - :ref:`FFT<tutorials_fft>`  -- Demonstration on how to use the amrex::FFT class for forward/inverse FFT and data manipulation
-- :ref:`FFTW<tutorials_fftw>`  -- FFTW and cuFFT single-rank tutorials.
 - :ref:`ForkJoin<tutorials_forkjoin>` -- Parallel execution and subgrouping of MPI ranks.
 - :ref:`GPU<tutorials_gpu>`  -- Offload work to the GPUs using AMReX tools.
-- :ref:`heFFTe<tutorials_heffte>`  -- heFFTe distributed tutorials.
 - :ref:`Linear Solvers<tutorials_linearsolvers>`  -- Examples of several linear solvers.
 - :ref:`ML/PYTORCH<tutorials_ml>`  -- Use of pytorch models to replace point-wise computational kernels.
 - :ref:`MPMD<tutorials_mpmd>` -- Usage of AMReX-MPMD (Multiple Program Multiple Data) framework.
@@ -60,8 +58,6 @@ sorted by the following categories:
   to solve a scalar advection-diffusion-reaction equation.
 - :ref:`SENSEI<tutorials_sensei>`  -- In situ data analysis and visualization through a unified interface.
 - :ref:`SUNDIALS<tutorials_sundials>`  -- Time integration with SUNDIALS backend and native AMReX types.
-- :ref:`SWFFT<tutorials_swfft>`  -- Demonstrates how to call the SWFFT wrapper to the FFTW3 (A distributed memory
-  implementation of the discrete Fourier transform) solver.
 
 
 .. toctree::
@@ -72,10 +68,8 @@ sorted by the following categories:
    Blueprint_Tutorial
    EB_Tutorial
    FFT_Tutorial
-   FFTW_Tutorial
    ForkJoin_Tutorial
    GPU_Tutorial
-   heFFTe_Tutorial
    LinearSolvers_Tutorial
    ML_Tutorial
    MPMD_Tutorials
@@ -85,7 +79,6 @@ sorted by the following categories:
    SDC_Tutorial
    SENSEI_Tutorial
    SUNDIALS_Tutorial
-   SWFFT_Tutorial
 
 
 .. _`AMR`:  AMR_Tutorial.html
@@ -98,14 +91,10 @@ sorted by the following categories:
 
 .. _`FFT`:  FFT_Tutorial.html
 
-.. _`FFTW`:  FFTW_Tutorial.html
-
 .. _`ForkJoin`:  ForkJoin_Tutorial.html
 
 .. _`GPU`:  GPU_Tutorial.html
 
-.. _`heFFTe`:  heFFTe_Tutorial.html
-
 .. _`Linear Solvers`:  LinearSolvers_Tutorial.html
 
 .. _`MPMD`:  MPMD_Tutorials.html
@@ -120,7 +109,6 @@ sorted by the following categories:
 
 .. _`SENSEI`: SENSEI_Tutorial.html
 
-.. _`SWFFT`: SWFFT_Tutorial.html