removed unecessary set secret -- it's an environment variable not a literal

dist/setup/index.js

@@ -28706,9 +28706,6 @@ function run() {
             if (gpgPrivateKey) {
                 core.setSecret(gpgPrivateKey);
             }
-            if (gpgPassphrase) {
-                core.setSecret(gpgPassphrase);
-            }
             yield auth.configAuthentication(id, username, password, gpgPassphrase);
             if (gpgPrivateKey) {
                 core.info('importing private key');

src/setup-java.ts

@@ -40,10 +40,6 @@ async function run() {
       core.setSecret(gpgPrivateKey);
     }
 
-    if (gpgPassphrase) {
-      core.setSecret(gpgPassphrase);
-    }
-
     await auth.configAuthentication(id, username, password, gpgPassphrase);
 
     if (gpgPrivateKey) {