chore(litellm): Remove transaction-based tracing (#7379)

Remove branches for the static trace lifecycle.
Remove manual tracing API calls in tests, as the outer transaction is no longer needed for GenAI spans in the streaming trace lifecycle.

Closes #7100

Author: alexander-alderman-webb

sentry_sdk/integrations/litellm.py

@@ -5,7 +5,6 @@
 from sentry_sdk import consts
 from sentry_sdk.ai.monitoring import record_token_usage
 from sentry_sdk.ai.utils import (
-    get_start_span_function,
     set_data_normalized,
     transform_openai_content_part,
     truncate_and_annotate_embedding_inputs,
@@ -101,29 +100,17 @@ def _input_callback(kwargs: "Dict[str, Any]") -> None:
         operation = "chat"
 
     # Start a new span/transaction
-    if has_span_streaming_enabled(client.options):
-        span = sentry_sdk.traces.start_span(
-            name=f"{operation} {model}",
-            attributes={
-                "sentry.op": (
-                    consts.OP.GEN_AI_CHAT
-                    if operation == "chat"
-                    else consts.OP.GEN_AI_EMBEDDINGS
-                ),
-                "sentry.origin": LiteLLMIntegration.origin,
-            },
-        )
-    else:
-        span = get_start_span_function()(
-            op=(
+    span = sentry_sdk.traces.start_span(
+        name=f"{operation} {model}",
+        attributes={
+            "sentry.op": (
                 consts.OP.GEN_AI_CHAT
                 if operation == "chat"
                 else consts.OP.GEN_AI_EMBEDDINGS
             ),
-            name=f"{operation} {model}",
-            origin=LiteLLMIntegration.origin,
-        )
-        span.__enter__()
+            "sentry.origin": LiteLLMIntegration.origin,
+        },
+    )
 
     _store_span(kwargs, span)