fix: Minor typo in grpc.py

Signed-off-by: Radhika Agrawal <agrawalradhika@google.com>

Author: agrawalradhika-cell

google/auth/transport/grpc.py

@@ -257,7 +257,6 @@ def my_client_cert_callback():
     # If SSL credentials are not explicitly set, try client_cert_callback and ADC.
     if not ssl_credentials:
 	use_client_cert = _mtls_helper.check_use_client_cert()
-        )
         if use_client_cert == "true" and client_cert_callback:
             # Use the callback if provided.
             cert, key = client_cert_callback()
@@ -295,7 +294,6 @@ class SslCredentials:
 
     def __init__(self):
 	use_client_cert = _mtls_helper.check_use_client_cert()
-        )
         if use_client_cert != "true":
             self._is_mtls = False
         else: