tree: Revisit updateTipRadii with tipSelectedIdx

[victorlin]

from #1864 (comment)

This code block:

auspice/src/actions/tree.js

Lines 218 to 224 in e8337a8

	if (tipSelectedIdx) {
	d.data = calcTipRadii({tipSelectedIdx, colorScale, tree});
	if (tt) {
	const idx = strainNameToIdx(treeToo.nodes, tree.nodes[tipSelectedIdx].name);
	d.dataToo = calcTipRadii({idx, colorScale, tree: treeToo});
	}
	} else {

is unused because updateTipRadii is never called with a value for tipSelectedIdx.

Possible solutions

1. Remove the code block
2. Investigate the original intent and add a call that uses the code block