chore(tracing): remove Span.finished setter and Span.finish_with_ancestors (#15212)

## Description

Deprecated in 3.x, now removed in 4.0

## Testing

<!-- Describe your testing strategy or note what tests are included -->

## Risks

<!-- Note any risks associated with this change, or "None" if no risks
-->

## Additional Notes

<!-- Any other information that would be helpful for reviewers -->

Co-authored-by: Emmett Butler <723615+emmettbutler@users.noreply.github.com>

Author: brettlangdon

ddtrace/_trace/span.py

@@ -269,19 +269,6 @@ def start(self, value: Union[int, float]) -> None:
     def finished(self) -> bool:
         return self.duration_ns is not None
 
-    @finished.setter
-    def finished(self, value: bool) -> None:
-        """Finishes the span if set to a truthy value.
-
-        If the span is already finished and a truthy value is provided
-        no action will occur.
-        """
-        if value:
-            if not self.finished:
-                self.duration_ns = Time.time_ns() - self.start_ns
-        else:
-            self.duration_ns = None
-
     @property
     def duration(self) -> Optional[float]:
         """The span duration in seconds."""
@@ -776,15 +763,6 @@ def _finish_with_ancestors(self) -> None:
             span.finish()
             span = span._parent
 
-    @removals.remove(removal_version="4.0.0")
-    def finish_with_ancestors(self) -> None:
-        """Finish this span along with all (accessible) ancestors of this span.
-
-        This method is useful if a sudden program shutdown is required and finishing
-        the trace is desired.
-        """
-        self._finish_with_ancestors()
-
     def __enter__(self) -> "Span":
         return self
 

releasenotes/notes/remove-span-finished-finish-with-ancestors-fb2d11b874206f59.yaml

@@ -0,0 +1,6 @@
+---
+upgrade:
+  - |
+    tracing: ``Span.finished`` setter was removed, please use ``Span.finish()`` method instead.
+  - |
+    tracing: ``Span.finish_with_ancestors`` was removed with no replacement.