feat: remove outdated theme option

BREAKING CHANGE: theme config parameter removed

popmon/config.py

@@ -26,9 +26,6 @@
 # (see https://joblib.readthedocs.io/en/latest/generated/joblib.Parallel.html for details)
 parallel_args = {"n_jobs": 1}
 
-# Usage the `ing_matplotlib_theme`
-themed = True
-
 
 class SectionModel(BaseModel):
     name: str
@@ -162,6 +159,9 @@ class Report(BaseModel):
     """if True, show all the generated statistics in the report (optional)
     if set to False, then smaller show_stats (see below)"""
 
+    online_report: bool = True
+    """Use a CDN to host resources, or embed them into the report."""
+
     show_stats: List[str] = [
         "distinct*",
         "filled*",