Revert "Fixed dragged text not being deleted after drop on another ed…

…itor (#3279)"

This reverts commit ac626c8.

packages/core/src/PasteRule.ts

@@ -160,9 +160,6 @@ function run(config: {
 export function pasteRulesPlugin(props: { editor: Editor, rules: PasteRule[] }): Plugin[] {
   const { editor, rules } = props
   let dragSourceElement: Element | null = null
-  let draggedElement: any
-  let draggedText: Selection | null = null
-  let caretOffset: number | undefined
   let isPastedFromProseMirror = false
   let isDroppedFromProseMirror = false
 
@@ -171,55 +168,25 @@ export function pasteRulesPlugin(props: { editor: Editor, rules: PasteRule[] }):
       // we register a global drag handler to track the current drag source element
       view(view) {
         const handleDragstart = (event: DragEvent) => {
-          draggedElement = event.target
-          draggedText = window.getSelection()
-          event.dataTransfer?.setData('text/plain', draggedText?.toString() as string)
           dragSourceElement = view.dom.parentElement?.contains(event.target as Element)
             ? view.dom.parentElement
             : null
         }
 
-        const handleDragEnter = (event: DragEvent) => {
-          event.preventDefault()
-        }
-
-        const handleDragOver = (event: DragEvent) => {
-          event.preventDefault()
-          let caretData
-
-          if (document.caretRangeFromPoint) {
-            caretData = document.caretRangeFromPoint(event.clientX, event.clientY)
-          }
-          caretOffset = caretData?.startOffset
-        }
-
         window.addEventListener('dragstart', handleDragstart)
 
-        window.addEventListener('dragenter', handleDragEnter)
-
-        window.addEventListener('dragover', handleDragOver)
-
         return {
           destroy() {
             window.removeEventListener('dragstart', handleDragstart)
-            window.removeEventListener('dragenter', handleDragEnter)
-            window.removeEventListener('dragover', handleDragOver)
           },
         }
       },
 
       props: {
         handleDOMEvents: {
-          drop: (view, event: any) => {
+          drop: view => {
             isDroppedFromProseMirror = dragSourceElement === view.dom.parentElement
-            event.preventDefault()
-
-            const data = event.dataTransfer?.getData('text/plain')
 
-            if (event.target.parentElement.className === 'ProseMirror') {
-              draggedElement.textContent = draggedElement.textContent.replace(data, '')
-              event.target.textContent = event.target.textContent.slice(0, caretOffset) + data + event.target.textContent.slice(caretOffset)
-            }
             return false
           },