The package jdk.internal.math was originally sun.misc.math and when it was renamed we can see all the JDK classes that needed to be updated :
changeset: 34781:479b1724ab80
user: chegar
date: Tue Dec 22 12:17:25 2015 +0000
summary: 8145990: Move sun.misc math support classes to jdk.internal.math

This included one marlin 2D renderer class.

Subsequently there was a fix that removed Marlin's dependency on this package :
changeset: 35979:4462913d471a
user: darcy
date: Tue Feb 16 09:09:31 2016 -0800
summary: 8149896: Remove unnecessary values in FloatConsts and DoubleConsts

But jigsaw was in progress and already had added the necessary qualified export
to java.base's module-info.java and was integrated very shortly after that including the already redundant export :
changeset: 13973:b2a69d66dc65
tag: jdk-9+111
parent: 13949:edb95a70985f
user: alanb
date: Thu Mar 17 19:04:16 2016 +0000
summary: 8142968: Module System implementation

In summary I think we can remove it.