chore: remove unneeded ts-node dev-dependency (open-telemetry#554)

Author: Flarna

plugins/node/opentelemetry-instrumentation-cassandra/package.json

@@ -61,7 +61,6 @@
     "rimraf": "3.0.2",
     "sinon": "9.2.4",
     "ts-mocha": "8.0.0",
-    "ts-node": "9.1.1",
     "typescript": "4.3.5",
     "cassandra-driver": "4.6.3"
   },

plugins/node/opentelemetry-instrumentation-pino/package.json

@@ -61,7 +61,6 @@
     "rimraf": "3.0.2",
     "sinon": "9.2.4",
     "ts-mocha": "8.0.0",
-    "ts-node": "9.1.1",
     "typescript": "4.3.5"
   },
   "dependencies": {