package.json: Remove all but the scripts needed for modern build

package.json

@@ -17,23 +17,11 @@
     "icon-gen": "electron-icon-maker --input=images/icon_1024.png --output=./build",
     "generate": "npm run icon-gen && grunt",
     "build": "build  --config.extraMetadata.environment=$SIGNAL_ENV",
-    "dist": "npm run generate && npm run build",
-    "pack": "npm run generate && npm run build -- --dir",
+    "build-release": "SIGNAL_ENV=production npm run build -- --config.directories.output=release",
     "prepare-beta-build": "node prepare_beta_build.js",
     "prepare-import-build": "node prepare_import_build.js",
-    "pack-prod": "SIGNAL_ENV=production npm run pack",
-    "dist-prod": "SIGNAL_ENV=production npm run dist",
-    "dist-prod-all": "SIGNAL_ENV=production npm run dist -- -mwl",
-    "build-release": "SIGNAL_ENV=production npm run build -- --config.directories.output=release",
-    "build-mas-release": "npm run build-release -- -m --config.mac.target=mas",
-    "build-mas-dev": "npm run build-release -- -m --config.mac.target=mas --config.type=development",
     "grunt": "grunt",
-    "prep-mac-release": "npm run build-release -- -m --dir",
-    "prep-release": "npm run generate && grunt prep-release && npm run build-release && npm run build-mas-release && grunt test-release",
-    "release-mac": "npm run build-release -- -m --prepackaged release/mac/Signal*.app --publish=always",
-    "release-win": "npm run build-release -- -w --prepackaged release/windows --publish=always",
-    "release-lin": "npm run build-release -- -l --prepackaged release/linux && NAME=$npm_package_name VERSION=$npm_package_version ./aptly.sh",
-    "release": "npm run release-mac && npm run release-win && npm run release-lin",
+    "publish-to-apt": "NAME=$npm_package_name VERSION=$npm_package_version ./aptly.sh",
     "test": "yarn test-node && yarn test-electron",
     "test-electron": "yarn grunt test",
     "test-node": "mocha --recursive test/app test/modules ts/test",