Fix preprocessor.

string-utils.xcodeproj/project.pbxproj

@@ -454,11 +454,6 @@
 			buildSettings = {
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				GCC_PREPROCESSOR_DEFINITIONS = (
-					XCODE_UNIT_TEST,
-					"DEBUG=1",
-					"$(inherited)",
-				);
 				INFOPLIST_FILE = "string_utils-test/Info.plist";
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
@@ -475,7 +470,6 @@
 			buildSettings = {
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				GCC_PREPROCESSOR_DEFINITIONS = XCODE_UNIT_TEST;
 				INFOPLIST_FILE = "string_utils-test/Info.plist";
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",