diff --git a/.prettierrc.json b/.prettierrc.json
index d4b5cdd..9891f43 100644
--- a/.prettierrc.json
+++ b/.prettierrc.json
@@ -1,9 +1,9 @@
-{
-    "printWidth": 80,
-    "tabWidth": 4,
-    "semi": true,
-    "singleQuote": true,
-    "trailingComma": "all",
-    "proseWrap": "always",
-    "endOfLine": "crlf"
-}
+{
+    "printWidth": 80,
+    "tabWidth": 4,
+    "semi": true,
+    "singleQuote": true,
+    "trailingComma": "all",
+    "proseWrap": "always",
+    "endOfLine": "lf"
+}
diff --git a/src/compiler.ts b/src/compiler.ts
index 2264b3c..22c4336 100644
--- a/src/compiler.ts
+++ b/src/compiler.ts
@@ -8,7 +8,6 @@ import {
 } from './preferences';
 import * as vscode from 'vscode';
 import { getJudgeViewProvider } from './extension';
-import telmetry from './telmetry';
 export let onlineJudgeEnv = false;
 
 export const setOnlineJudgeEnv = (value: boolean) => {
diff --git a/src/judge.ts b/src/judge.ts
index 9c166fa..256f251 100644
--- a/src/judge.ts
+++ b/src/judge.ts
@@ -1,5 +1,4 @@
 import { TestCase, Problem, Case } from './types';
-import { EOL } from 'os';
 /**
  * Judge whether the testcase stdout is correct
  *
diff --git a/src/secrets.ts b/src/secrets.ts
deleted file mode 100644
index 52cf261..0000000
--- a/src/secrets.ts
+++ /dev/null
@@ -1,3 +0,0 @@
-export default {
-    appInsightsKey: '', // replace with actual key when publishing.
-};