api!: remove dc_all_work_done()

Also cleaned up test_connectivity()
which tested that state does not flicker to WORKING
when there are no messages to be fetched.
The state is expected to flicker to WORKING
when checking for new messages,
so the tests were outdated since
change 3b0b2379b8

python/src/deltachat/account.py

@@ -671,9 +671,6 @@ class Account:
     def get_connectivity_html(self) -> str:
         return from_dc_charpointer(lib.dc_get_connectivity_html(self._dc_context))
 
-    def all_work_done(self):
-        return lib.dc_all_work_done(self._dc_context)
-
     def start_io(self):
         """start this account's IO scheduling (Rust-core async scheduler).
 

python/src/deltachat/events.py

@@ -158,12 +158,6 @@ class FFIEventTracker:
 
             self.get_matching("DC_EVENT_CONNECTIVITY_CHANGED")
 
-    def wait_for_all_work_done(self):
-        while True:
-            if self.account.all_work_done():
-                return
-            self.get_matching("DC_EVENT_CONNECTIVITY_CHANGED")
-
     def ensure_event_not_queued(self, event_name_regex):
         __tracebackhide__ = True
         rex = re.compile(f"(?:{event_name_regex}).*")