diff --git a/translator/trace/opencensus_helper.go b/translator/trace/opencensus_helper.go
deleted file mode 100644
index ac00f8ef662a..000000000000
--- a/translator/trace/opencensus_helper.go
+++ /dev/null
@@ -1,29 +0,0 @@
-// Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//       http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package tracetranslator
-
-import (
-	tracepb "github.com/census-instrumentation/opencensus-proto/gen-go/trace/v1"
-)
-
-// OCAttributeKeyExist returns true if a key in attribute of an OC Span exists.
-// It returns false, if attributes is nil, the map itself is nil or the key wasn't found.
-func OCAttributeKeyExist(ocAttributes *tracepb.Span_Attributes, key string) bool {
-	if ocAttributes == nil || ocAttributes.AttributeMap == nil {
-		return false
-	}
-	_, foundKey := ocAttributes.AttributeMap[key]
-	return foundKey
-}
diff --git a/translator/trace/protospan_translation.go b/translator/trace/protospan_translation.go
index dde254354992..903967b30cc3 100644
--- a/translator/trace/protospan_translation.go
+++ b/translator/trace/protospan_translation.go
@@ -26,13 +26,6 @@ import (
 
 // Some of the keys used to represent OTLP constructs as tags or annotations in other formats.
 const (
-	AnnotationDescriptionKey = "description"
-
-	MessageEventIDKey               = "message.id"
-	MessageEventTypeKey             = "message.type"
-	MessageEventCompressedSizeKey   = "message.compressed_size"
-	MessageEventUncompressedSizeKey = "message.uncompressed_size"
-
 	TagMessage = "message"
 
 	TagSpanKind = "span.kind"