Remove closing PHP tag from export as PHP array

From the PHP manual[1]:

> The closing tag of a PHP block at the end of a file is optional, and in some
> cases omitting it is helpful when using include or require, so unwanted
> whitespace will not occur at the end of files, and you will still be able to
> add headers to the response later. It is also handy if you use output
> buffering, and would not like to see added unwanted whitespace at the end of
> the parts generated by the included files.

1: https://www.php.net/manual/en/language.basic-syntax.instruction-separation.php#example-41

source/exportgrid.pas

@@ -1048,8 +1048,6 @@ begin
         tmp := '\end{tabular}' + CRLF;
       efPHPArray: begin
         tmp := ');' + CRLF;
-        if radioOutputFile.Checked then
-          tmp := tmp + '?>';
       end;
       efJSON: begin
         S.Size := S.Size - 1;