docs: remove unnecessary Basics heading from single-section pages

Author: gulien

docs/manipulate-pdfs/attachments.mdx

@@ -8,8 +8,6 @@ import Sponsors from "@site/src/components/documentation/Sponsors";
 
 Embeds external files directly inside the PDF container. Commonly used for e-invoicing standards like **[ZUGFeRD / Factur-X](https://fnfe-mpe.org/factur-x/)**, which require a machine-readable XML invoice as an attachment.
 
-## Basics
-
 <ApiEndpoint
   method="POST"
   path="/forms/pdfengines/embed"

docs/manipulate-pdfs/encrypt-pdfs.mdx

@@ -11,8 +11,6 @@ Encrypts one or more PDF files with a user and/or owner password.
 
 <EncryptionPDFEngines showFormFields={false} showCurlExample={false} />
 
-## Basics
-
 <ApiEndpoint
   method="POST"
   path="/forms/pdfengines/encrypt"

docs/manipulate-pdfs/flatten-pdfs.mdx

@@ -8,8 +8,6 @@ import Sponsors from "@site/src/components/documentation/Sponsors";
 
 Flattens one or more PDF files by merging all interactive form fields (text inputs, checkboxes, etc.) into the page content. The resulting PDF cannot be edited.
 
-## Basics
-
 <ApiEndpoint
   method="POST"
   path="/forms/pdfengines/flatten"

docs/manipulate-pdfs/pdfa-pdfua.mdx

@@ -14,8 +14,6 @@ This endpoint relies on **LibreOffice** to re-process documents. This operation
 
 :::
 
-## Basics
-
 <ApiEndpoint
   method="POST"
   path="/forms/pdfengines/convert"

docs/manipulate-pdfs/read-bookmarks.mdx

@@ -8,8 +8,6 @@ import Sponsors from "@site/src/components/documentation/Sponsors";
 
 Extracts bookmarks (the document outline / table of contents) from one or more PDF files. Returns a JSON object keyed by filename, where each bookmark contains a `title`, a `page` number, and optional `children`.
 
-## Basics
-
 <ApiEndpoint
   method="POST"
   path="/forms/pdfengines/bookmarks/read"

docs/manipulate-pdfs/read-metadata.mdx

@@ -13,8 +13,6 @@ The returned keys correspond to ExifTool tag names.
 [See the ExifTool Tag Names documentation](https://exiftool.org/TagNames/PDF.html) for reference on what fields might be returned.
 :::
 
-## Basics
-
 <ApiEndpoint
   method="POST"
   path="/forms/pdfengines/metadata/read"

docs/manipulate-pdfs/rotate-pdfs.mdx

@@ -8,8 +8,6 @@ import Sponsors from "@site/src/components/documentation/Sponsors";
 
 Rotates pages of one or more PDF files by a given angle. You can target all pages or specific page ranges.
 
-## Basics
-
 <ApiEndpoint
   method="POST"
   path="/forms/pdfengines/rotate"

docs/manipulate-pdfs/stamp-pdfs.mdx

@@ -11,8 +11,6 @@ Adds a stamp _on top of_ the content of each page of one or more PDF files. Use
 
 <SyntaxStampPDFEngines />
 
-## Basics
-
 <ApiEndpoint
   method="POST"
   path="/forms/pdfengines/stamp"

docs/manipulate-pdfs/watermark-pdfs.mdx

@@ -11,8 +11,6 @@ Adds a watermark _behind_ the content of each page of one or more PDF files. Use
 
 <SyntaxWatermarkPDFEngines />
 
-## Basics
-
 <ApiEndpoint
   method="POST"
   path="/forms/pdfengines/watermark"

docs/manipulate-pdfs/write-bookmarks.mdx

@@ -8,8 +8,6 @@ import Sponsors from "@site/src/components/documentation/Sponsors";
 
 Writes bookmarks (the document outline / table of contents) into one or more PDF files. You can provide bookmarks as a single list (applied to all files) or as a map of filename to bookmarks for per-file control.
 
-## Basics
-
 <ApiEndpoint
   method="POST"
   path="/forms/pdfengines/bookmarks/write"