fix: remove pageBreak from default schema

Author: nperez0111

packages/core/src/blocks/defaultBlocks.ts

@@ -12,7 +12,6 @@ import {
   createHeadingBlockSpec,
   createImageBlockSpec,
   createNumberedListItemBlockSpec,
-  createPageBreakBlockSpec,
   createParagraphBlockSpec,
   createQuoteBlockSpec,
   createToggleListItemBlockSpec,
@@ -44,7 +43,6 @@ export const defaultBlockSpecs = {
   heading: createHeadingBlockSpec(),
   image: createImageBlockSpec(),
   numberedListItem: createNumberedListItemBlockSpec(),
-  pageBreak: createPageBreakBlockSpec(),
   paragraph: createParagraphBlockSpec(),
   quote: createQuoteBlockSpec(),
   table: createTableBlockSpec(),