Merge branch 'fil/brush-dataless' into fil/brush-x

# Conflicts:
#	src/interactions/brush.js

Author: Fil

docs/interactions/brush.md

@@ -25,7 +25,7 @@ The **brush mark** renders a two-dimensional [brush](https://d3js.org/d3-brush)
 :::plot hidden
 ```js
 Plot.plot({
-  marks: ((brush) => (d3.timeout(() => d3.select(brush._brushNodes[0]).call(brush._brush.move, [[100, 60], [300, 200]])), [
+  marks: ((brush) => (d3.timeout(() => brush.move({x1: 36, x2: 48, y1: 15, y2: 20})), [
     Plot.dot(penguins, {x: "culmen_length_mm", y: "culmen_depth_mm", stroke: "species"}),
     brush
   ]))(Plot.brush())

src/interactions/brush.js

@@ -172,10 +172,7 @@ export class Brush extends Mark {
       const d = n.__data__;
       return (fx === undefined || d?.x === fx) && (fy === undefined || d?.y === fy);
     });
-    if (!node)
-      throw new Error(
-        fx === undefined && fy === undefined ? "No brush node found" : "No brush node found for the specified facet"
-      );
+    if (!node) return;
     const [px1, px2] = [x1, x2].map(this._applyX).sort(ascending);
     const [py1, py2] = [y1, y2].map(this._applyY).sort(ascending);
     select(node).call(