Revert "perf(sentry): Add tag for over-limit spans" (#44682)

Reverts getsentry/sentry#44671

Seeing if this is causing missing transactions.

src/sentry/utils/sdk.py

@@ -254,12 +254,6 @@ def traces_sampler(sampling_context):
     return float(settings.SENTRY_BACKEND_APM_SAMPLING or 0)
 
 
-def before_send_transaction(event):
-    # Occasionally the span limit is hit and we drop spans from transactions, this helps find transactions where this occurs.
-    event["tags"]["spans_over_limit"] = len(event["spans"]) >= 1000
-    return event
-
-
 # Patches transport functions to add metrics to improve resolution around events sent to our ingest.
 # Leaving this in to keep a permanent measurement of sdk requests vs ingest.
 def patch_transport_for_instrumentation(transport, transport_name):
@@ -295,7 +289,6 @@ def configure_sdk():
         f"backend@{sdk_options['release']}" if "release" in sdk_options else None
     )
     sdk_options["send_client_reports"] = True
-    sdk_options["before_send_transaction"] = before_send_transaction
 
     if upstream_dsn:
         transport = make_transport(get_options(dsn=upstream_dsn, **sdk_options))