Remove unused import

Author: Irene Alvarado

src/git.ts

@@ -1,5 +1,5 @@
 import { exec, ExecOptions } from '@actions/exec'
-import { statSync, existsSync } from 'fs'
+import { statSync } from 'fs'
 import path from 'path'
 import * as core from '@actions/core'
 import { CONNREFUSED } from 'node:dns'