Revert "pass thru GITHUB_TOKEN for GH Actions"

This reverts commit 7dcb852.

Author: sayansisodiya

src/review/reviewer.ts

@@ -46,9 +46,7 @@ export const reviewDiff = async (
         GITHUB_PR_NUMBER: prContext.pr_number.toString(),
         GITHUB_APP_ID: process.env.GITHUB_APP_ID || '',
         GITHUB_APP_PRIVATE_KEY_PATH: process.env.GITHUB_APP_PRIVATE_KEY_PATH || '',
-        GITHUB_APP_PRIVATE_KEY: process.env.GITHUB_APP_PRIVATE_KEY || '',
         GITHUB_APP_CWD: process.env.GITHUB_APP_CWD || '',
-        GITHUB_TOKEN: process.env.GITHUB_TOKEN || '',
       };
 
       // Execute Amp review using SDK