Remove inheritance

Signed-off-by: Yuri Shkuro <[email protected]>

src/samplers/_adapt_sampler.js

@@ -48,11 +48,11 @@ export default adaptSampler;
  * However, to keep compatible with existing behavior, onCreateSpan and onSetTag
  * return retryable decision, because previously that's how tracer was behaving.
  */
-class LegacySamplerV1Adapter extends BaseSamplerV2 {
+class LegacySamplerV1Adapter implements Sampler {
+  apiVersion = SAMPLER_API_V2;
   _delegate: LegacySamplerV1;
 
   constructor(delegate: LegacySamplerV1) {
-    super(`SamplerV1Adapter(${delegate.name()})`);
     this._delegate = delegate;
   }
 
@@ -73,6 +73,10 @@ class LegacySamplerV1Adapter extends BaseSamplerV2 {
     return { sample: false, retryable: true, tags: null };
   }
 
+  toString(): string {
+    return this._delegate.toString();
+  }
+
   close(callback: ?Function) {
     this._delegate.close(callback);
   }