chore(viz): remove legacy explore_json + viz.py pipeline (#41714)

Co-authored-by: Claude Code <noreply@anthropic.com>

superset-frontend/plugins/plugin-chart-parallel-coordinates/src/transformProps.ts

@@ -0,0 +1,48 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+import { ChartProps } from '@superset-ui/core';
+import { isThemeDark } from '@apache-superset/core/theme';
+
+export default function transformProps(chartProps: ChartProps) {
+  const { width, height, formData, queriesData, theme } = chartProps;
+  const {
+    includeSeries,
+    linearColorScheme,
+    metrics,
+    secondaryMetric,
+    series,
+    showDatatable,
+  } = formData;
+
+  return {
+    width,
+    height,
+    data: queriesData[0].data,
+    defaultLineColor: theme.colorTextTertiary,
+    includeSeries,
+    isDarkMode: isThemeDark(theme),
+    linearColorScheme,
+    metrics: metrics.map((m: { label?: string } | string) =>
+      typeof m === 'string' ? m : m.label || m,
+    ),
+    colorMetric: secondaryMetric?.label || secondaryMetric,
+    series,
+    showDatatable,
+  };
+}