remove docstring in write_to_stats() causing sphinx build to fail

Author: BurnzZ

itemloaders/__init__.py

@@ -449,11 +449,6 @@ def write_to_stats(
     ):
         """Responsible for logging the parser rules usage.
 
-        NOTES: It's hard to easily denote which parser rule hasn't produced any
-          data for the entire crawl, since ItemLoaders essentially don't know
-          when the spider is going to be closed, as well as it has many
-          instantiations all throughout the code.
-
         The implementation below where each missing parsed_data is being logged
         to the stat is clunky, but necessary. With this, we can only surmise
         that it's safe to remove parser fallback parser if it's all just