build(deps): clean up unused karma browser testing dependencies/files

Fixes hyperledger-cacti#2539

Signed-off-by: Peter Somogyvari <peter.somogyvari@accenture.com>

package.json

@@ -81,7 +81,6 @@
     "posttest:all": "tap --no-check-coverage --coverage-report=lcov && codecov",
     "test:unit": "tap --ts --node-arg=--max-old-space-size=4096 --timeout=600 --no-check-coverage \"packages/cactus-*/src/test/typescript/unit/\"",
     "test:benchmark": "tap --ts --jobs=1 --no-timeout --no-check-coverage \"packages/cactus-*/src/test/typescript/benchmark/\"",
-    "test:browser": "karma start karma.conf.js",
     "test:integration": "tap --ts --node-arg=--max-old-space-size=4096 --jobs=1 --timeout=3600 --no-check-coverage \"packages/cactus-*/src/test/typescript/integration/\"",
     "changelog": "conventional-changelog --infile CHANGELOG.md --outfile CHANGELOG.md && git add CHANGELOG.md",
     "commit": "git-cz --signoff",
@@ -118,7 +117,6 @@
     "crypto-browserify": "3.12.0",
     "cspell": "5.6.6",
     "del-cli": "4.0.1",
-    "electron": "18.3.7",
     "es-main": "1.0.2",
     "eslint": "7.32.0",
     "eslint-config-prettier": "8.3.0",
@@ -139,11 +137,6 @@
     "jest": "28.1.0",
     "jest-extended": "2.0.0",
     "json5": "2.2.2",
-    "karma": "6.3.16",
-    "karma-chrome-launcher": "3.1.0",
-    "karma-electron": "7.0.0",
-    "karma-tap": "4.2.0",
-    "karma-webpack": "5.0.0",
     "license-report": "6.4.0",
     "lint-staged": "11.1.2",
     "make-dir-cli": "3.0.0",
@@ -216,9 +209,6 @@
     "deasync": {
       "built": false
     },
-    "electron": {
-      "built": false
-    },
     "es5-ext": {
       "built": false
     },

packages/cactus-test-tooling/package.json

@@ -79,6 +79,7 @@
     "node-ssh": "12.0.0",
     "p-retry": "4.6.1",
     "run-time-error": "1.4.0",
+    "socket.io": "4.5.4",
     "socket.io-client": "4.5.4",
     "tar-stream": "2.2.0",
     "temp": "0.9.4",