message: build(WASI): Do not add extra wasm-opt step
  Seems not longer required either because we updated wasi-sdk or
  installed binaryen.
diff: @@ -43,7 +43,7 @@ function(add_executable target)
  set_property(TARGET ${wasm_target} PROPERTY LINK_FLAGS_DEBUG " -fno-lto -s DISABLE_EXCEPTION_CATCHING=0 --bind ${_link_flags_debug}")
  set_property(TARGET ${umd_target} PROPERTY LINK_FLAGS_DEBUG " -fno-lto -s DISABLE_EXCEPTION_CATCHING=0 --bind ${_link_flags_debug}")
  else()
  - set_property(TARGET ${wasm_target} PROPERTY SUFFIX ".wasi.no-opt.wasm")
  + set_property(TARGET ${wasm_target} PROPERTY SUFFIX ".wasi.wasm")
  if (NOT TARGET wasi-exception-shim AND DEFINED CMAKE_CXX_COMPILE_OBJECT)
  add_library(wasi-exception-shim STATIC /ITKWebAssemblyInterface/src/exceptionShim.cxx)
  endif()
  @@ -52,14 +52,6 @@ function(add_executable target)
  _target_link_libraries(${target} PRIVATE $<$<LINK_LANGUAGE:CXX>:wasi-exception-shim>)
  get_property(_link_flags TARGET ${wasm_target} PROPERTY LINK_FLAGS)
  set_property(TARGET ${wasm_target} PROPERTY LINK_FLAGS "-Wl,--export-if-defined=main -Wl,--export-if-defined=itk_wasm_input_array_alloc -Wl,--export-if-defined=itk_wasm_input_json_alloc -Wl,--export-if-defined=itk_wasm_output_json_address -Wl,--export-if-defined=itk_wasm_output_json_size -Wl,--export-if-defined=itk_wasm_output_array_address -Wl,--export-if-defined=itk_wasm_output_array_size -Wl,--export-if-defined=itk_wasm_free_all ${_link_flags}")
  - if(NOT DEFINED ITK_WASM_WASM_OPT_FLAGS)
  - set(ITK_WASM_WASM_OPT_FLAGS "-O2")
  - endif()
  - add_custom_command(TARGET ${wasm_target} POST_BUILD
  - COMMAND /usr/bin/wasm-opt ${ITK_WASM_WASM_OPT_FLAGS}
  - "$<TARGET_FILE:${wasm_target}>"
  - -o "$<TARGET_FILE_BASE_NAME:${wasm_target}>.wasi.wasm"
  - VERBATIM)
  endif()
  endif()
  endfunction()
  