Revert "Non-working try baggage to inherit force tracing/sampling"

This reverts commit d15fa457c9.

synapse/logging/tracing.py

@@ -619,32 +619,6 @@ def start_span(
     if kind is None:
         kind = SpanKind.INTERNAL
 
-    if context is None:
-        context = get_context_from_span(get_active_span())
-
-    logger.info(
-        "is_context_forced_tracing(context)=%s context=%s",
-        is_context_forced_tracing(context),
-        context,
-    )
-
-    if is_context_forced_tracing(context):
-        parent_span_context = get_span_context_from_context(context)
-        if parent_span_context:
-            force_sample_span_context = opentelemetry.trace.span.SpanContext(
-                trace_id=parent_span_context.trace_id,
-                span_id=parent_span_context.span_id,
-                is_remote=False,
-                # Force sampled so this trace is exported
-                trace_flags=opentelemetry.trace.TraceFlags(
-                    opentelemetry.trace.TraceFlags.SAMPLED
-                ),
-            )
-            # Overwrite the context with the sampled flag on
-            context = trace.set_span_in_context(
-                opentelemetry.trace.NonRecordingSpan(force_sample_span_context)
-            )
-
     return tracer.start_span(
         name=name,
         context=context,
@@ -803,38 +777,18 @@ def force_tracing(span: Optional["opentelemetry.trace.span.Span"] = None) -> Non
         # regardless of what IsRecording/Sampled on the SpanContext says
         span.set_attribute(SynapseTags.FORCE_TRACING, True)
 
-        ctx = get_context_from_span(span)
-        logger.info("set_baggage on ctx=%s", ctx)
-        # This doesn't work because `set_baggage` returns a new context
-        # that we can't apply back to the span so the baggage is lost
-        opentelemetry.baggage.set_baggage(
-            SynapseBaggage.FORCE_TRACING, "1", context=ctx
-        )
-
-        force_tracing_baggage = opentelemetry.baggage.get_baggage(
-            SynapseBaggage.FORCE_TRACING, context=ctx
-        )
-        opentelemetry.baggage.set_baggage("foo", "bar", context=ctx)
-        foo_baggage = opentelemetry.baggage.get_baggage("foo", context=ctx)
-        # TODO: Why is this still None after we just set it?
-        logger.info(
-            "after set_baggage on force_tracing_baggage=%s foo_baggage=%s",
-            force_tracing_baggage,
-            foo_baggage,
-        )
+        # ctx = get_context_from_span(span)
+        # opentelemetry.baggage.set_baggage(
+        #     SynapseBaggage.FORCE_TRACING, "1", context=ctx
+        # )
 
 
 def is_context_forced_tracing(
-    context: "opentelemetry.context.context.Context",
+    span_context: Optional["opentelemetry.shim.opentracing_shim.SpanContextShim"],
 ) -> bool:
     """Check if sampling has been force for the given span context."""
-    force_tracing_baggage = opentelemetry.baggage.get_baggage(
-        SynapseBaggage.FORCE_TRACING, context=context
-    )
-    logger.info(
-        "is_context_forced_tracing force_tracing_baggage=%s", force_tracing_baggage
-    )
-    return force_tracing_baggage is not None
+    # TODO
+    return False
 
 
 # Injection and extraction