Revert "Close even if the target buffer has not been loaded yet"

This reverts commit 7b14e4e05e6b38ed8deecd89ac8ab686fa80f844.

plugin/bufexplorer.vim

@@ -808,8 +808,6 @@ function! s:SelectBuffer(...)
                     let _bufName = expand("#"._bufNbr.":p")
                     execute _bufName ? "drop ".escape(_bufName, " ") : "buffer "._bufNbr
                 endif
-            else
-                call s:Close()
             endif
 
             " Switch to the selected buffer.