feat: remove *AsRichText helpers (#347)

* feat: remove `*AsRichText` helpers

The migration-related helpers will be made available through a dedicated package to limit their impact on this core Prismic SDK.

* chore: remove staled snapshot

---------

Co-authored-by: lihbr <lihbr@users.noreply.github.com>

Author: lihbr

package-lock.json

@@ -79,19 +79,7 @@
 		"test": "npm run lint && npm run types && npm run unit && npm run build && npm run size"
 	},
 	"dependencies": {
-		"hast": "^1.0.0",
-		"hast-util-select": "^6.0.2",
-		"hast-util-to-html": "^9.0.1",
-		"imgix-url-builder": "^0.0.5",
-		"mdast-util-to-string": "^4.0.0",
-		"rehype-minify-whitespace": "^6.0.0",
-		"rehype-parse": "^9.0.0",
-		"remark-parse": "^11.0.0",
-		"remark-rehype": "^11.1.0",
-		"unified": "^11.0.5",
-		"unist-util-remove": "^4.0.0",
-		"unist-util-visit": "^5.0.0",
-		"vfile": "^6.0.2"
+		"imgix-url-builder": "^0.0.5"
 	},
 	"devDependencies": {
 		"@prismicio/mock": "^0.3.7",
@@ -114,7 +102,7 @@
 		"standard-version": "^9.5.0",
 		"ts-expect": "^1.3.0",
 		"typescript": "^5.5.4",
-		"vite": "^5.3.4",
+		"vite": "^5.3.5",
 		"vite-plugin-sdk": "^0.1.2",
 		"vitest": "^2.0.4"
 	},

package.json

@@ -80,8 +80,6 @@ export { mapSliceZone, unstable_mapSliceZone }
 
 // Conversion helper.
 export { documentToLinkField } from "./helpers/documentToLinkField"
-export { unstable_htmlAsRichText } from "./helpers/unstable_htmlAsRichText"
-export { unstable_markdownAsRichText } from "./helpers/unstable_markdownAsRichText"
 
 export type { LinkResolverFunction } from "./helpers/asLink"
 export type { AsLinkAttrsConfig } from "./helpers/asLinkAttrs"
@@ -103,8 +101,6 @@ export type {
 }
 export type { HTMLRichTextSerializer } from "./helpers/asHTML"
 
-export type { RichTextHTMLMapSerializer } from "./helpers/unstable_htmlAsRichText"
-
 //=============================================================================
 // Errors - Custom errors for Prismic APIs.
 //=============================================================================
@@ -119,10 +115,6 @@ export { PreviewTokenExpiredError } from "./errors/PreviewTokenExpired"
 export { ParsingError } from "./errors/ParsingError"
 export { RepositoryNotFoundError } from "./errors/RepositoryNotFoundError"
 
-// Rich Text Errors
-export { PrismicRichTextError } from "./errors/PrismicRichTextError"
-export { PrismicRichTextSerializerError } from "./errors/PrismicRichTextSerializerError"
-
 //=============================================================================
 // Types - Types representing Prismic content, models, and API payloads.
 //=============================================================================