Remove pre-approved licenses from excluded-packages.json

Author: azmkercso

build-tools/oss-attribution/excluded-packages.json

@@ -1,7 +1,4 @@
 {
   "code-oss-dev@1.101.2": "UNLICENSED",
-  "jschardet@3.1.4": "LGPL-2.1-or-later",
-  "chownr@3.0.0": "BlueOak-1.0.0",
-  "tar@7.5.4": "BlueOak-1.0.0",
-  "yallist@5.0.0": "BlueOak-1.0.0"
+  "jschardet@3.1.4": "LGPL-2.1-or-later"
 }