Please remove hardcoded geometry when converting to PDF via pandoc

[newptcai]

Currently, when converting jmd to PDF via pandoc, the following header file is included.

It has one line of code

\usepackage[a4paper,text={16.5cm,25.2cm},centering]{geometry}

This forbids user from changing the geometry of the output.

I could not think of a walk around so far.