Processor.download: apply config.OCRD_DOWNLOAD_INPUT no sooner than a…

…vailable, remove useless download_files kwarg

src/ocrd/processor/base.py

@@ -306,7 +306,6 @@ def __init__(
             input_file_grp=None,
             output_file_grp=None,
             page_id=None,
-            download_files=config.OCRD_DOWNLOAD_INPUT,
             version=None
     ):
         """
@@ -331,8 +330,6 @@ def __init__(
                  (or empty for all pages). \
                  Deprecated since version 3.0: Should be ``None`` here, but then needs to be set \
                  before processing.
-             download_files (boolean): Whether input files will be downloaded prior to processing, \
-                 defaults to :py:attr:`ocrd_utils.config.OCRD_DOWNLOAD_INPUT` which is ``True`` by default
         """
         if ocrd_tool is not None:
             deprecation_warning("Passing 'ocrd_tool' as keyword argument to Processor is deprecated - "
@@ -361,7 +358,7 @@ def __init__(
             deprecation_warning("Passing a page_id kwarg other than 'None' to Processor "
                                 "is deprecated - pass as argument to process_workspace instead")
             self.page_id = page_id or None
-        self.download = download_files
+        self.download = config.OCRD_DOWNLOAD_INPUT
         #: The logger to be used by processor implementations.
         # `ocrd.processor.base` internals should use :py:attr:`self._base_logger`
         self.logger = getLogger(f'ocrd.processor.{self.__class__.__name__}')