Reduce exe file

Question

Using Delphi (or in general any tools, if exist of course), is it possible to reduce size of an exe file, removing all code that not is used but that is present there?
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Answer 1

If your aim is to reduce the size of your executable, you can use a tool which compress it and allow to execute it as it was not compress.. (=not a zip)

For instance, you can check UPX which works nicely with delphi programs.