Delete duplicate line from oauth2/client/core.adoc

docs/modules/ROOT/pages/servlet/oauth2/client/core.adoc

@@ -8,7 +8,6 @@ This section describes the OAuth2 core interfaces and classes that Spring Securi
 
 `ClientRegistration` is a representation of a client registered with an OAuth 2.0 or OpenID Connect 1.0 Provider.
 
-A client registration holds information, such as client id, client secret, authorization grant type, redirect URI, scope(s), authorization URI, token URI, and other details.
 A `ClientRegistration` object holds information, such as client id, client secret, authorization grant type, redirect URI, scope(s), authorization URI, token URI, and other details.
 
 `ClientRegistration` and its properties are defined as follows: