Revert "Add Auto-Illustrations feature (DistributedProofreaders#706)" (…

…DistributedProofreaders#707)

This reverts commit 287d6e2.

src/guiguts/application.py

@@ -16,7 +16,6 @@
 from guiguts.file import File, the_file, NUM_RECENT_FILES
 from guiguts.footnotes import footnote_check, FootnoteIndexStyle
 from guiguts.html_convert import HTMLGeneratorDialog, HTMLMarkupTypes
-from guiguts.html_tools import HTMLImageDialog
 from guiguts.illo_sn_fixup import illosn_check
 from guiguts.maintext import maintext
 from guiguts.mainwindow import (
@@ -441,9 +440,6 @@ def initialize_preferences(self) -> None:
             PrefKey.HTML_UNDERLINE_MARKUP, HTMLMarkupTypes.SPAN_CLASS
         )
         preferences.set_default(PrefKey.HTML_SHOW_PAGE_NUMBERS, True)
-        preferences.set_default(PrefKey.HTML_IMAGE_UNIT, "%")
-        preferences.set_default(PrefKey.HTML_IMAGE_OVERRIDE_EPUB, True)
-        preferences.set_default(PrefKey.HTML_IMAGE_ALIGNMENT, "center")
 
         # Check all preferences have a default
         for pref_key in PrefKey:
@@ -775,9 +771,6 @@ def init_html_menu(self) -> None:
         """Create the HTML menu."""
         menu_tools = Menu(menubar(), "HT~ML")
         menu_tools.add_button("HTML ~Generator...", HTMLGeneratorDialog.show_dialog)
-        menu_tools.add_button(
-            "Auto-~Illustrations...", lambda: HTMLImageDialog.show_dialog(destroy=True)
-        )
 
     def init_view_menu(self) -> None:
         """Create the View menu."""