Keep default SWIFT_VERSION as this is already 3.0

SwiftyStoreKit.xcodeproj/project.pbxproj

@@ -711,7 +711,6 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.musevisions.iOS.SwiftyStoreDemo;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 3.0;
 				TARGETED_DEVICE_FAMILY = 1;
 			};
 			name = Debug;
@@ -727,7 +726,6 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.musevisions.iOS.SwiftyStoreDemo;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_VERSION = 3.0;
 				TARGETED_DEVICE_FAMILY = 1;
 			};
 			name = Release;
@@ -748,7 +746,6 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.musevisions.iOS.SwiftyStoreKit;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
-				SWIFT_VERSION = 3.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -772,7 +769,6 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_VERSION = 3.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -841,7 +837,6 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.musevisions.OSX.SwiftyStoreDemo;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = macosx;
-				SWIFT_VERSION = 3.0;
 			};
 			name = Debug;
 		};
@@ -859,7 +854,6 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = macosx;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_VERSION = 3.0;
 			};
 			name = Release;
 		};