if using singularity and x509 proxy, do not make this conditional on file transfer

gstlal/python/config/__init__.py

@@ -161,7 +161,7 @@ class Config:
 			submit_opts['+SingularityImage'] = f'"{singularity_image}"'
 			submit_opts['transfer_executable'] = False
 			submit_opts['getenv'] = False
-			if self.condor.transfer_files and x509_proxy:
+			if x509_proxy:
 				submit_opts['x509userproxy'] = x509_proxy
 				submit_opts['use_x509userproxy'] = True
 			if not self.condor.transfer_files: