chore: drop contributors from multiple places (#179)

Author: JustinBeckwith

packages/google-privacy-dlp/.mailmap

@@ -28,19 +28,6 @@
     "dlp",
     "DLP API"
   ],
-  "contributors": [
-    "Ace Nassri <[email protected]>",
-    "Alexander Fenster <[email protected]>",
-    "Ernest Landrito <[email protected]>",
-    "Evawere Ogbe <[email protected]>",
-    "Jason Dobry <[email protected]>",
-    "Luke Sneeringer <[email protected]>",
-    "Song Wang <[email protected]>",
-    "Stephen <[email protected]>",
-    "Stephen Sawchuk <[email protected]>",
-    "Tim Swast <[email protected]>",
-    "greenkeeper[bot] <greenkeeper[bot]@users.noreply.github.com>"
-  ],
   "scripts": {
     "cover": "nyc --reporter=lcov mocha test/*.js && nyc report",
     "docs": "jsdoc -c .jsdoc.js",