fix: Remove unneeded import

Author: AbhiPrasad

packages/core/src/log.ts

@@ -7,7 +7,7 @@ import type { ParameterizedString } from './types-hoist';
 import type { DynamicSamplingContext, LogEnvelope, LogItem } from './types-hoist/envelope';
 import type { Log, LogAttribute, LogSeverityLevel } from './types-hoist/log';
 import { createEnvelope, dropUndefinedKeys, dsnToString, isParameterizedString, logger } from './utils-hoist';
-import { getActiveSpan, spanToJSON } from './utils/spanUtils';
+import { getActiveSpan } from './utils/spanUtils';
 
 const LOG_BUFFER_MAX_LENGTH = 25;