remove unnecessary auth function logger (#4536)

Author: Will-ShaoHua

packages/core/src/codewhisperer/util/authUtil.ts

@@ -286,9 +286,12 @@ export class AuthUtil {
 
     public isConnectionValid(): boolean {
         const connectionValid = this.conn !== undefined && !this.secondaryAuth.isConnectionExpired
-        getLogger().debug(`codewhisperer: Connection is valid = ${connectionValid}, 
+        if (connectionValid === false) {
+            getLogger().debug(`codewhisperer: Connection is valid = ${connectionValid}, 
                             connection is undefined = ${this.conn === undefined},
                             secondaryAuth connection expired = ${this.secondaryAuth.isConnectionExpired}`)
+        }
+
         return connectionValid
     }