chore(middleware-sdk-transcribe-streaming): remove unused yarn build before test (#3250)

Author: trivikr

packages/middleware-sdk-transcribe-streaming/package.json

@@ -11,7 +11,6 @@
     "build:types": "tsc -p tsconfig.types.json",
     "build:types:downlevel": "downlevel-dts dist-types dist-types/ts3.4",
     "clean": "rimraf ./dist-*",
-    "pretest": "yarn build",
     "test": "jest --passWithNoTests"
   },
   "author": {