Build/Test Tools: Remove more unnecessary direct dependencies.

This removes the `is-plain-object`, `memize`, `path-to-regexp`, and `tslib`.

These were also introduced in [56065] and have been integrated into the build process. Instead, these are now installed as peer dependencies through the `@/wordpress/*` packages that actually require them.

Follow up to [57634].

Props swissspidy.
See #59658.

git-svn-id: https://develop.svn.wordpress.org/trunk@57636 602fd350-edb4-49c9-b593-d223f7449a82

package.json

@@ -152,24 +152,20 @@
 		"formdata-polyfill": "4.0.10",
 		"hoverintent": "2.2.1",
 		"imagesloaded": "5.0.0",
-		"is-plain-object": "5.0.0",
 		"jquery": "3.7.1",
 		"jquery-color": "2.2.0",
 		"jquery-form": "4.3.0",
 		"jquery-hoverintent": "1.10.2",
 		"json2php": "^0.0.7",
 		"lodash": "4.17.21",
 		"masonry-layout": "4.2.2",
-		"memize": "2.1.0",
 		"moment": "2.29.4",
 		"objectFitPolyfill": "2.3.5",
-		"path-to-regexp": "6.2.1",
 		"polyfill-library": "4.8.0",
 		"react": "18.2.0",
 		"react-dom": "18.2.0",
 		"react-is": "18.2.0",
 		"regenerator-runtime": "0.14.0",
-		"tslib": "2.6.2",
 		"underscore": "1.13.6",
 		"whatwg-fetch": "3.6.17",
 		"wicg-inert": "3.1.2"