Remove Cocoapods warning of OTHER_LDFLAGS

We don’t use the Tests library target anyway.

src/objective-c/tests/Tests.xcodeproj/project.pbxproj

@@ -391,7 +391,6 @@
 		635697DC1B14FC11007A7283 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				OTHER_LDFLAGS = "-ObjC";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
 			};
@@ -400,7 +399,6 @@
 		635697DD1B14FC11007A7283 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				OTHER_LDFLAGS = "-ObjC";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
 			};