fix: removed unnecessary knip.jsonc entries (#1164)

## PR Checklist

- [x] Addresses an existing open issue: fixes #1163
- [x] That issue was marked as [`status: accepting
prs`](https://github.com/JoshuaKGoldberg/create-typescript-app/issues?q=is%3Aopen+is%3Aissue+label%3A%22status%3A+accepting+prs%22)
- [x] Steps in
[CONTRIBUTING.md](https://github.com/JoshuaKGoldberg/create-typescript-app/blob/main/.github/CONTRIBUTING.md)
were taken

## Overview

Removes the unnecessary entries.

knip.jsonc

@@ -1,13 +1,8 @@
 {
 	"$schema": "https://unpkg.com/knip@latest/schema.json",
-	"entry": [
-		"src/index.ts!",
-		"src/guide/index.ts",
-		"src/initialize/index.ts",
-		"src/migrate/index.ts",
-		"script/*e2e.js"
-	],
+	"entry": ["src/index.ts!", "script/*e2e.js"],
 	"ignoreBinaries": ["gh"],
+	// https://github.com/webpro/knip/issues/417
 	"ignoreDependencies": ["script"],
 	"ignoreExportsUsedInFile": {
 		"interface": true,

script/__snapshots__/migrate-test-e2e.js.snap

@@ -202,14 +202,9 @@ exports[`expected file changes > knip.jsonc 1`] = `
 @@ ... @@
  {
  	"$schema": "https://unpkg.com/knip@latest/schema.json",
--	"entry": [
--		"src/index.ts!",
--		"src/guide/index.ts",
--		"src/initialize/index.ts",
--		"src/migrate/index.ts",
--		"script/*e2e.js"
--	],
+-	"entry": ["src/index.ts!", "script/*e2e.js"],
 -	"ignoreBinaries": ["gh"],
+-	// https://github.com/webpro/knip/issues/417
 -	"ignoreDependencies": ["script"],
 -	"ignoreExportsUsedInFile": {
 -		"interface": true,