Disable image compression when saving PDF

Some tests [1] lead to the conclusion that ocr_compression does the same
to the file (performance and size-wise) to the file as deflating images
when saving the file. However, both methods active do add a bit of extra
time. For this reason we're disabling the image deflation (default
option).

[1]: #622 (comment)

dangerzone/conversion/pixels_to_pdf.py

@@ -88,7 +88,7 @@ async def convert(
         else:
             safe_pdf_path = f"/safezone/safe-output-compressed.pdf"
 
-        safe_doc.save(safe_pdf_path, deflate_images=True)
+        safe_doc.save(safe_pdf_path)
 
 
 async def main() -> int: