Remove manually adding quota project header.

Author: DylanRussell

samples/otlptrace/example_grpc.py

@@ -32,7 +32,7 @@
 This is a sample script that exports OTLP traces encoded as protobufs via gRPC. 
 """
 
-credentials, project_id = google.auth.default()
+credentials, _ = google.auth.default()
 request = google.auth.transport.requests.Request()
 resource = Resource.create(attributes={SERVICE_NAME: "otlp-gcp-grpc-sample"})
 

samples/otlptrace/example_http.py

@@ -24,15 +24,12 @@
 from opentelemetry.sdk.trace import TracerProvider
 from opentelemetry.sdk.trace.export import BatchSpanProcessor
 
-credentials, project_id = google.auth.default()
+credentials, _ = google.auth.default()
 trace_provider = TracerProvider(
     resource=Resource.create(attributes={SERVICE_NAME: "otlp-gcp-http-sample"})
 )
 processor = BatchSpanProcessor(
     OTLPSpanExporter(
-        headers={
-            "x-goog-user-project": credentials.quota_project_id,
-        },
         session=AuthorizedSession(credentials),
     )
 )