Remove errantly added files, and fix the idl (for reference's sake)

        * storage/JSCustomSQLStatementCallback.h: Removed.
        * storage/JSCustomSQLStatementErrorCallback.h: Removed.
        * storage/JSCustomSQLTransactionCallback.h: Removed.
        * storage/JSCustomSQLTransactionErrorCallback.h: Removed.
        * storage/SQLStatementCallback.idl:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@27775 268f45cc-cd09-0410-ab3c-d52691b4dbfc