fix(ui): revert unrelated code (#10897)

### What?
Reverts mixed code written for #10825 that accidentally made it into
#10888

Author: JarrodMFlesch

packages/ui/src/forms/Form/mergeServerFormState.ts

@@ -33,7 +33,6 @@ export const mergeServerFormState = ({
 
   if (acceptValues) {
     serverPropsToAccept.push('value')
-    serverPropsToAccept.push('initialValue')
   }
 
   let changed = false

test/fields/collections/Lexical/components/ClearState.tsx

@@ -264,19 +264,6 @@ describe('lexicalMain', () => {
     })
   })
 
-  test('should be able to externally mutate editor state', async () => {
-    await navigateToLexicalFields()
-    const richTextField = page.locator('.rich-text-lexical').nth(1).locator('.editor-scroller') // first
-    await expect(richTextField).toBeVisible()
-    await richTextField.click() // Use click, because focus does not work
-    await page.keyboard.type('some text')
-    const spanInEditor = richTextField.locator('span').first()
-    await expect(spanInEditor).toHaveText('some text')
-    await saveDocAndAssert(page)
-    await page.locator('#clear-lexical-lexicalSimple').click()
-    await expect(spanInEditor).not.toBeAttached()
-  })
-
   test('should be able to bold text using floating select toolbar', async () => {
     await navigateToLexicalFields()
     const richTextField = page.locator('.rich-text-lexical').nth(2) // second

test/fields/collections/Lexical/e2e/main/e2e.spec.ts

@@ -317,20 +317,6 @@ export const LexicalFields: CollectionConfig = {
         ],
       }),
     },
-    {
-      type: 'ui',
-      name: 'clearLexicalState',
-      admin: {
-        components: {
-          Field: {
-            path: '/collections/Lexical/components/ClearState.js#ClearState',
-            clientProps: {
-              fieldName: 'lexicalSimple',
-            },
-          },
-        },
-      },
-    },
     {
       name: 'lexicalWithBlocks',
       type: 'richText',