chore: remove stream-json package as it is no longer used

packages/embark/package.json

@@ -113,7 +113,6 @@
     "simples": "0.8.8",
     "solc": "0.5.0",
     "source-map-support": "0.5.13",
-    "stream-json": "1.3.0",
     "string-replace-async": "1.2.1",
     "term.js": "0.0.7",
     "viz.js": "1.8.2",

yarn.lock

@@ -19737,11 +19737,6 @@ stream-browserify@^2.0.1:
     inherits "~2.0.1"
     readable-stream "^2.0.2"
 
-stream-chain@^2.1.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/stream-chain/-/stream-chain-2.1.0.tgz#a058a7104d7261a71bf7eb4c5f496f13dc665320"
-  integrity sha512-PAUXdRGm0G8P0+/+JEd3O9kfmB9kwmr2nKIc5zhcsHn0KdBByD5PJ2po21iDzc+TZsOSEbU8j4JbAevJsZkLyQ==
-
 stream-each@^1.1.0:
   version "1.2.3"
   resolved "https://registry.yarnpkg.com/stream-each/-/stream-each-1.2.3.tgz#ebe27a0c389b04fbcc233642952e10731afa9bae"
@@ -19761,13 +19756,6 @@ stream-http@^2.7.2:
     to-arraybuffer "^1.0.0"
     xtend "^4.0.0"
 
-stream-json@1.3.0:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/stream-json/-/stream-json-1.3.0.tgz#c7c0f40a808ce91181c15018fc3dbcd09bcd6cf8"
-  integrity sha512-3qLDv/xnwmleb5kssgmKbGPqcLou2tbFIgj3CM3fy5PxKaAmeCv103Zp4LKIALdE30zMHTJn09yVwxq773btaw==
-  dependencies:
-    stream-chain "^2.1.0"
-
 stream-shift@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/stream-shift/-/stream-shift-1.0.0.tgz#d5c752825e5367e786f78e18e445ea223a155952"