Remove JOSS-related information from main branch.

Author: CZHU20

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-## NOTE
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-This branch is created from master on Jan 4, 2022 and will be referenced in the manuscript to be submitted for the Journal of Open Source Software (JOSS).
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 ## Introduction
 
 `svFSI` is a multi-physics finite element solver designed for computational modeling of the cardiovascular system. It is a major component of the ongoing SimVascular [**SimCardio**](http://simvascular.github.io/docsSimCardio.html) project that aims to provide the complete pipeline for cardiac modeling, from image segmentation to computational modeling.