diff --git a/core/src/main/java/hudson/security/HudsonPrivateSecurityRealm.java b/core/src/main/java/hudson/security/HudsonPrivateSecurityRealm.java
index 68c7ef46a7c5a59b7237bd69af19b7cb69cc73aa..9d76d072806fc42a7e7057ade4f59b71f2b3c474 100644
--- a/core/src/main/java/hudson/security/HudsonPrivateSecurityRealm.java
+++ b/core/src/main/java/hudson/security/HudsonPrivateSecurityRealm.java
@@ -41,7 +41,6 @@ import org.acegisecurity.GrantedAuthority;
 import org.acegisecurity.GrantedAuthorityImpl;
 import org.acegisecurity.context.SecurityContextHolder;
 import org.acegisecurity.providers.UsernamePasswordAuthenticationToken;
-import org.acegisecurity.providers.dao.DaoAuthenticationProvider;
 import org.acegisecurity.providers.encoding.PasswordEncoder;
 import org.acegisecurity.providers.encoding.ShaPasswordEncoder;
 import org.acegisecurity.userdetails.UserDetails;