[IMPR] None as default value can be omitted with dict.get()

Change-Id: I18650a58b1bd205f251d1eda397b3b1778dd9f5d
---
M pywikibot/page/_wikibase.py
M pywikibot/echo.py
M pywikibot/site/_basesite.py
3 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/pywikibot/echo.py b/pywikibot/echo.py
index 18112da..9d271ee 100644
--- a/pywikibot/echo.py
+++ b/pywikibot/echo.py
@@ -59,8 +59,8 @@
         except KeyError:
             notif.read = False
 
-        notif.content = data.get('*', None)
-        notif.revid = data.get('revid', None)
+        notif.content = data.get('*')
+        notif.revid = data.get('revid')
         return notif
 
     def mark_as_read(self) -> bool:
diff --git a/pywikibot/page/_wikibase.py b/pywikibot/page/_wikibase.py
index 0e278c8..d7e9f5c 100644
--- a/pywikibot/page/_wikibase.py
+++ b/pywikibot/page/_wikibase.py
@@ -1579,7 +1579,7 @@
         """
         claim_repo = site.get_repo_for_entity_type('property')
         claim = cls(claim_repo, data['mainsnak']['property'],
-                    datatype=data['mainsnak'].get('datatype', None))
+                    datatype=data['mainsnak'].get('datatype'))
         if 'id' in data:
             claim.snak = data['id']
         elif 'hash' in data:
diff --git a/pywikibot/site/_basesite.py b/pywikibot/site/_basesite.py
index c0311d3..a5f92df 100644
--- a/pywikibot/site/_basesite.py
+++ b/pywikibot/site/_basesite.py
@@ -414,7 +414,7 @@
 
     def interwiki_putfirst(self):
         """Return list of language codes for ordering of interwiki links."""
-        return self.family.interwiki_putfirst.get(self.code, None)
+        return self.family.interwiki_putfirst.get(self.code)
 
     def getSite(self, code):  # noqa: N802
         """Return Site object for language 'code' in this Family."""

