chore: remove unused test configs

packages/peer-exchange/.mocharc.json

@@ -1,11 +0,0 @@
-{
-  "extension": ["ts"],
-  "spec": "src/**/*.spec.ts",
-  "require": ["ts-node/register", "isomorphic-fetch", "jsdom-global/register"],
-  "loader": "ts-node/esm",
-  "node-option": [
-    "experimental-specifier-resolution=node",
-    "loader=ts-node/esm"
-  ],
-  "exit": true
-}

packages/peer-exchange/karma.conf.cjs

@@ -1,45 +0,0 @@
-process.env.CHROME_BIN = require("puppeteer").executablePath();
-const webpack = require("webpack");
-
-module.exports = function (config) {
-  config.set({
-    frameworks: ["webpack", "mocha"],
-    files: ["src/**/*.ts"],
-    preprocessors: {
-      "src/**/*.ts": ["webpack"],
-    },
-    envPreprocessor: ["CI"],
-    reporters: ["progress"],
-    browsers: ["ChromeHeadless"],
-    singleRun: true,
-    client: {
-      mocha: {
-        timeout: 6000, // Default is 2s
-      },
-    },
-    webpack: {
-      mode: "development",
-      module: {
-        rules: [{ test: /\.([cm]?ts|tsx)$/, loader: "ts-loader" }],
-      },
-      plugins: [
-        new webpack.DefinePlugin({
-          "process.env.CI": process.env.CI || false,
-        }),
-        new webpack.ProvidePlugin({
-          process: "process/browser.js",
-        }),
-      ],
-      resolve: {
-        extensions: [".ts", ".tsx", ".js"],
-        extensionAlias: {
-          ".js": [".js", ".ts"],
-          ".cjs": [".cjs", ".cts"],
-          ".mjs": [".mjs", ".mts"],
-        },
-      },
-      stats: { warnings: false },
-      devtool: "inline-source-map",
-    },
-  });
-};