build: remove unused madge and material.angular.io image optimization (#30675)

Remove the unused madge dependency and the image optimization scripts for material.angular.io along with its no longer used dependencies

Author: josephperrott

.aspect/rules/external_repository_action_cache/npm_translate_lock_MzA5NzUwNzMx

@@ -2,7 +2,7 @@
 # Input hashes for repository rule npm_translate_lock(name = "npm2", pnpm_lock = "@//:pnpm-lock.yaml").
 # This file should be checked into version control along with the pnpm-lock.yaml file.
 .npmrc=-2023857461
-package.json=219919003
-pnpm-lock.yaml=897151155
+package.json=-857504119
+pnpm-lock.yaml=-100482244
 pnpm-workspace.yaml=1711114604
-yarn.lock=-1734434772
+yarn.lock=514682322

material.angular.io/package.json

@@ -21,8 +21,6 @@
     "publish-prod": "bash ./tools/deploy.sh stable prod",
     "publish-dev": "bash ./tools/deploy.sh",
     "publish-beta": "bash ./tools/deploy.sh stable beta",
-    "scenes:generate": "ng e2e --port 4201 scenes && yarn scenes:optimize",
-    "scenes:optimize": "node tools/optimize-scene-screenshots",
     "test:audit:localhost": "node tools/audit-docs dist/material-angular-io",
     "test:audit:bazel": "node tools/audit-docs $(bazel cquery --output=files //:build.production)",
     "test:audit:ci": "node tools/audit-docs ../dist/material-angular-io"
@@ -69,7 +67,6 @@
     "@angular/compiler-cli": "^19.2.0",
     "@bazel/bazelisk": "^1.12.1",
     "@stylistic/eslint-plugin": "^2.6.2",
-    "@types/imagemin": "^7.0.0",
     "@types/jasmine": "^3.7.7",
     "@types/node": "^18.11.9",
     "@types/shelljs": "~0.8.8",
@@ -81,8 +78,6 @@
     "eslint-plugin-jsdoc": "^48.2.1",
     "eslint-plugin-prefer-arrow": "^1.2.3",
     "firebase-tools": "^11.0.1",
-    "imagemin": "^7.0.1",
-    "imagemin-pngquant": "^9.0.2",
     "jasmine-core": "^3.7.1",
     "jasmine-spec-reporter": "^6.0.0",
     "karma": "~6.4.1",