remove maybeAutoTickFormat

Author: mbostock

src/axes.js

@@ -1,22 +1,5 @@
-import {format, utcFormat} from "d3";
-import {formatIsoDate} from "./format.js";
-import {constant, isTemporal, string} from "./options.js";
 import {isOrdinalScale} from "./scales.js";
 
 export function inferFontVariant(scale) {
   return isOrdinalScale(scale) && scale.interval === undefined ? undefined : "tabular-nums";
 }
-
-// D3 doesn’t provide a tick format for ordinal scales; we want shorthand when
-// an ordinal domain is numbers or dates, and we want null to mean the empty
-// string, not the default identity format. TODO Remove this in favor of the
-// axis mark’s inferTickFormat.
-export function maybeAutoTickFormat(tickFormat, domain) {
-  return tickFormat === undefined
-    ? isTemporal(domain)
-      ? formatIsoDate
-      : string
-    : typeof tickFormat === "function"
-    ? tickFormat
-    : (typeof tickFormat === "string" ? (isTemporal(domain) ? utcFormat : format) : constant)(tickFormat);
-}

src/legends/swatches.js

@@ -1,9 +1,10 @@
 import {pathRound as path} from "d3";
-import {inferFontVariant, maybeAutoTickFormat} from "../axes.js";
-import {createContext, create} from "../context.js";
+import {inferFontVariant} from "../axes.js";
+import {create, createContext} from "../context.js";
 import {isNoneish, maybeColorChannel, maybeNumberChannel} from "../options.js";
 import {isOrdinalScale, isThresholdScale} from "../scales.js";
 import {applyInlineStyles, impliedString, maybeClassName} from "../style.js";
+import {inferTickFormat} from "../marks/axis.js";
 
 function maybeScale(scale, key) {
   if (key == null) return key;
@@ -85,7 +86,7 @@ function legendItems(scale, options = {}, swatch) {
   } = options;
   const context = createContext(options);
   className = maybeClassName(className);
-  tickFormat = maybeAutoTickFormat(tickFormat, scale.domain);
+  if (typeof tickFormat !== "function") tickFormat = inferTickFormat(scale.scale, undefined, tickFormat);
 
   const swatches = create("div", context).attr(
     "class",