wxGUI/psmap: remove loading EPS file via using Ghostscript image rendering on OS MS Windows platform

[tmszi]

Describe the bug
wxGUI Cartographic Composer preview image doesn't rendered on OS MS Windows platform.

To Reproduce
Steps to reproduce the behavior:

1. Download and install e.g. WinGRASS-8.3.dev
2. Launch wxGUI Cartographic Composer g.gui.psmap
3. Add Map frame and choose some raster map e.g. elevation
4. Push toolbar Show preview (green triangle) tool
5. See error

Traceback (most recent call last):
  File "C:\Program Files\GRASS GIS 8.3\gui\wxpython\psmap\frame.py", line 482, in OnCmdDone
    im.save(self.imgName, format="PNG")
  File "C:\Program Files\GRASS GIS 8.3\Python39\lib\site-packages\PIL\Image.py", line 2117, in save
    self._ensure_mutable()
  File "C:\Program Files\GRASS GIS 8.3\Python39\lib\site-packages\PIL\Image.py", line 619, in _ensure_mutable
    self._copy()
  File "C:\Program Files\GRASS GIS 8.3\Python39\lib\site-packages\PIL\Image.py", line 612, in _copy
    self.load()
  File "C:\Program Files\GRASS GIS 8.3\gui\wxpython\psmap\utils.py", line 465, in loadPSForWindows
    self.im = GhostscriptForWindows(self.tile, self.size, self.fp)
  File "C:\Program Files\GRASS GIS 8.3\gui\wxpython\psmap\utils.py", line 492, in GhostscriptForWindows
    command = string.join(command)
AttributeError: module 'string' has no attribute 'join'

Expected behavior
Preview image should be rendered as on other OS platforms.

System description:

• Operating System: MS Windows
• GRASS GIS version: all versions

Additional context
I tried to fix the error above, including a function GhostscriptForWindows

grass/gui/wxpython/psmap/utils.py

Line 471 in c7495e2

def GhostscriptForWindows(tile, size, fp):

that didn't work (need much more code changes), but I found that this function isn't needed and the preview works without it (PIL module has ability to load EPS file directly, without using Ghostscript image rendering).

[petrasovaa]

Great the workaround is not needed any more, thank you for fixing it.