A quick way to decline all packages that have been marked for deployment on a development client is use SQL:
UPDATE SY900.F98825 SET UPINPKST=40 --Decline WHERE UPMKEY='DEV_CLIENT_NAME'
Development client has been around for a while. You’ve since deployed many update packages. The developer has neglected to take all the update packages. Something goes wrong and you have to install the latest full package. Well, that full package contains all the code changes from the update packages. So, even though those update packages will show up upon login, they are not required in order to stay current.