Remove unreferenced 'GPBMessageSignatureProtocol' class.
Remove unreferenced 'GPBMessageSignatureProtocol' class that is just taking up
space in the Objective C runtime information by hanging the protocol it needs to
declare off of GPBRootObject instead.
Small binary size reduction, but more importantly a removal of a class that
appears to be unused when statically analyzed.
diff --git a/objectivec/GPBRootObject.m b/objectivec/GPBRootObject.m
index 585d205..bad2f9a 100644
--- a/objectivec/GPBRootObject.m
+++ b/objectivec/GPBRootObject.m
@@ -43,6 +43,14 @@
- (const char *)singletonNameC;
@end
+// We need some object to conform to the MessageSignatureProtocol to make sure
+// the selectors in it are recorded in our Objective C runtime information.
+// GPBMessage is arguably the more "obvious" choice, but given that all messages
+// inherit from GPBMessage, conflicts seem likely, so we are using GPBRootObject
+// instead.
+@interface GPBRootObject () <GPBMessageSignatureProtocol>
+@end
+
@implementation GPBRootObject
// Taken from http://www.burtleburtle.net/bob/hash/doobs.html
