chore(shim-opentracing): remove posttest script (open-telemetry#315)

closes open-telemetry#242

Signed-off-by: Olivier Albertini <olivier.albertini@montreal.ca>

Author: OlivierAlbertini

packages/opentelemetry-shim-opentracing/package.json

@@ -11,8 +11,7 @@
     "clean": "rimraf build/*",
     "check": "gts check",
     "compile": "tsc -p .",
-    "fix": "gts fix",
-    "posttest": "yarn run check"
+    "fix": "gts fix"
   },
   "keywords": [
     "opentelemetry",