improve bundle size and build process for tests

config/rollup/pipeline.build.js

@@ -59,32 +59,6 @@ module.exports = (esm, options, { declarationFiles = false, outputStyle = false
       format: esm ? 'esm' : 'umd',
       generatedCode: esm ? 'es2015' : 'es5',
       file: path.resolve(distPath, `${file}${esm ? '.esm' : ''}.js`),
-      plugins: [
-        rollupTerser({
-          ecma: esm ? 2015 : 5,
-          safari10: true,
-
-          mangle: {
-            safari10: true,
-            keep_fnames: true, // eslint-disable-line camelcase
-            /*
-            properties: {
-              regex: /^_/,
-            },
-            */
-          },
-          compress: {
-            defaults: false,
-            hoist_funs: true, // eslint-disable-line camelcase
-          },
-          format: {
-            beautify: true,
-            max_line_len: 80, // eslint-disable-line camelcase
-            braces: true,
-            indent_level: 2, // eslint-disable-line camelcase
-          },
-        }),
-      ],
     },
     esm,
     buildMinifiedVersion