remove offsetZ default from measurement label

CHANGELOG.md

@@ -6,6 +6,8 @@ Note that since we don't clearly distinguish between a public and private interf
 
 ## [Unreleased]
 
+- Fix measurement label `offsetZ` default: not needed when `scaleByRadius` is enbaled
+
 ## [v3.43.1] - 2023-12-04
 
 - Fix `react-markdown` dependency

src/mol-repr/shape/loci/label.ts

@@ -22,7 +22,6 @@ export interface LabelData {
 
 const TextParams = {
     ...LociLabelTextParams,
-    offsetZ: PD.Numeric(2, { min: 0, max: 10, step: 0.1 }),
 };
 type TextParams = typeof TextParams