Make Carthage cache work

CryptoSwift.xcodeproj/project.pbxproj

@@ -714,7 +714,6 @@
 				ONLY_ACTIVE_ARCH = YES;
 				PRODUCT_NAME = CryptoSwift;
 				SUPPORTED_PLATFORMS = "iphonesimulator iphoneos macosx appletvos watchos appletvsimulator watchsimulator";
-				SWIFT_INSTALL_OBJC_HEADER = NO;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_VERSION = 3.0;
 				TARGETED_DEVICE_FAMILY = "1,2,3,4";
@@ -770,7 +769,6 @@
 				METAL_ENABLE_DEBUG_INFO = NO;
 				PRODUCT_NAME = CryptoSwift;
 				SUPPORTED_PLATFORMS = "iphonesimulator iphoneos macosx appletvos watchos appletvsimulator watchsimulator";
-				SWIFT_INSTALL_OBJC_HEADER = NO;
 				SWIFT_VERSION = 3.0;
 				TARGETED_DEVICE_FAMILY = "1,2,3,4";
 				TVOS_DEPLOYMENT_TARGET = 9.0;