chore: remove prettier-playground dir because it is not used.

Author: baseballyama

prettier-playground/a.svelte

@@ -1,5 +1,5 @@
 <script>
-	import A from 'prettier-playground/a.svelte';
+	import A from 'A.svelte';
 
 	const foo = 'foo';
 	let text = '';

prettier-playground/test.html

@@ -1,5 +1,5 @@
 <script>
-	import A from 'prettier-playground/a.svelte';
+	import A from 'A.svelte';
 
 	const foo = 'foo';
 	let text = '';

tests/fixtures/rules/mustache-spacing/invalid/always-after-expression/test01-input.svelte

@@ -1,5 +1,5 @@
 <script>
-	import A from 'prettier-playground/a.svelte';
+	import A from 'A.svelte';
 
 	const foo = 'foo';
 	let text = '';

tests/fixtures/rules/mustache-spacing/invalid/always-after-expression/test01-output.svelte

@@ -1,5 +1,5 @@
 <script>
-	import A from 'prettier-playground/a.svelte';
+	import A from 'A.svelte';
 
 	const foo = 'foo';
 	let text = '';

tests/fixtures/rules/mustache-spacing/invalid/always/test01-input.svelte

@@ -1,5 +1,5 @@
 <script>
-	import A from 'prettier-playground/a.svelte';
+	import A from 'A.svelte';
 
 	const foo = 'foo';
 	let text = '';

tests/fixtures/rules/mustache-spacing/invalid/always/test01-output.svelte

@@ -1,5 +1,5 @@
 <script>
-	import A from 'prettier-playground/a.svelte';
+	import A from 'A.svelte';
 
 	const foo = 'foo';
 	let text = '';

tests/fixtures/rules/mustache-spacing/invalid/test01-input.svelte

@@ -1,5 +1,5 @@
 <script>
-	import A from 'prettier-playground/a.svelte';
+	import A from 'A.svelte';
 
 	const foo = 'foo';
 	let text = '';

tests/fixtures/rules/mustache-spacing/invalid/test01-output.svelte

@@ -1,5 +1,5 @@
 <script>
-	import A from 'prettier-playground/a.svelte';
+	import A from 'A.svelte';
 
 	const foo = 'foo';
 	let text = '';