FIRTransactionOptions.mm: remove unused using declaration for MakeString

dconeybe · dconeybe · commit adf78534dced · 2022-05-30T11:08:37.000-04:00
diff --git a/Firestore/Source/API/FIRTransactionOptions.mm b/Firestore/Source/API/FIRTransactionOptions.mm
@@ -28,7 +28,6 @@
 NS_ASSUME_NONNULL_BEGIN
 
 using firebase::firestore::api::kDefaultTransactionMaxAttempts;
-using firebase::firestore::util::MakeString;
 using firebase::firestore::util::ThrowInvalidArgument;
 
 @implementation FIRTransactionOptions
