Remove unused postcss plugin

packages/person-select/package.json

@@ -15,7 +15,6 @@
     "rollup-plugin-commonjs": "^10.0.2",
     "rollup-plugin-copy": "^3.1.0",
     "rollup-plugin-node-resolve": "^5.2.0",
-    "rollup-plugin-postcss": "^2.0.3",
     "rollup-plugin-serve": "^1.0.1",
     "rollup-plugin-terser": "^5.1.1",
     "rollup-plugin-json": "^4.0.0",

packages/person-select/rollup.config.js

 import path from 'path';
 import resolve from 'rollup-plugin-node-resolve';
 import commonjs from 'rollup-plugin-commonjs';
-import postcss from 'rollup-plugin-postcss';
 import copy from 'rollup-plugin-copy';
 import {terser} from "rollup-plugin-terser";
 import json from 'rollup-plugin-json';
@@ -34,11 +33,6 @@ export default {
         replace({
             "process.env.BUILD": '"' + build + '"',
         }),
-        postcss({
-            inject: false,
-            minimize: false,
-            plugins: []
-        }),
         (build !== 'local' && build !== 'test') ? terser() : false,
         copy({
             targets: [