[cleanup] remove "continue" parameter from siteinfo request

Also remove site.mw_version check due to T306637.
Keep adding rawcontinue until other dependencies are solved.
Keep site.mw_version check, otherwise api_tests.TestLazyLoginNoUsername
fails.

Bug: T343204
Change-Id: I8bc3101d257630ab61bfbb436f35253065de0ab4
---
M pywikibot/site/_siteinfo.py
M pywikibot/data/api/_requests.py
2 files changed, 22 insertions(+), 9 deletions(-)

diff --git a/pywikibot/data/api/_requests.py b/pywikibot/data/api/_requests.py
index 25f7e57..ee19e54 100644
--- a/pywikibot/data/api/_requests.py
+++ b/pywikibot/data/api/_requests.py
@@ -434,11 +434,11 @@
                and self.site.has_extension('ProofreadPage'):
                 prop = set(self['prop'] + ['proofread'])
                 self['prop'] = sorted(prop)
-            # When neither 'continue' nor 'rawcontinue' is present and the
-            # version number is at least 1.25wmf5 we add a dummy rawcontinue
-            # parameter. Querying siteinfo is save as it adds 'continue'
-            # except for 'tokens' (T284577)
-            if ('tokens' not in meta and 'continue' not in self._params
+            # When neither 'continue' nor 'rawcontinue' is present we add a
+            # dummy rawcontinue parameter except for 'tokens' (T284577) and
+            # 'siteinfo' (T343204)
+            if ('tokens' not in meta and 'siteinfo' not in meta
+                and 'continue' not in self._params
                     and self.site.mw_version >= '1.25wmf5'):
                 self._params.setdefault('rawcontinue', [''])
 
diff --git a/pywikibot/site/_siteinfo.py b/pywikibot/site/_siteinfo.py
index 2863823..4aa01df 100644
--- a/pywikibot/site/_siteinfo.py
+++ b/pywikibot/site/_siteinfo.py
@@ -1,6 +1,6 @@
 """Objects representing site info data contents."""
 #
-# (C) Pywikibot team, 2008-2022
+# (C) Pywikibot team, 2008-2023
 #
 # Distributed under the terms of the MIT license.
 #
@@ -158,9 +158,7 @@
                 'action': 'query', 'meta': 'siteinfo', 'siprop': props,
             }
         )
-        # With 1.25wmf5 it'll require continue or rawcontinue. As we don't
-        # continue anyway we just always use continue.
-        request['continue'] = True
+
         # warnings are handled later
         request._warning_handler = warn_handler
         try:

