Simplify entry document terminology

Co-authored-by: Mike Kistler <mikekistler@microsoft.com>

versions/3.0.4.md

@@ -124,7 +124,7 @@ An OpenAPI Description (OAD) MAY be made up of a single document or be divided i
 Any document consisting entirely of an [OpenAPI Object](#openapi-object) is known as a **syntactically complete OpenAPI document**.
 An OpenAPI document that does _not_ reference any other documents is known as a **self-contained OpenAPI document**.
 A single-document description is therefore _both_ syntactically complete _and_ self-contained.
-In a multi-document description, the document containing the OpenAPI Object where parsing begins for a specific API's description is known as that API's **entry OpenAPI document**, or simply **entry document**.
+In a multi-document description, the document containing the OpenAPI Object where parsing begins for a specific API's description is known as that API's **entry document**.
 
 It is RECOMMENDED that the entry OpenAPI document be named: `openapi.json` or `openapi.yaml`.