Fixes warning in xcodeproj.

Author: Guido Marucci Blas

ReactiveArray.xcodeproj/project.pbxproj

@@ -450,7 +450,6 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				FRAMEWORK_SEARCH_PATHS = (
-					"$(SDKROOT)/Developer/Library/Frameworks",
 					"$(inherited)",
 					"$(PROJECT_DIR)/Carthage/Build/iOS",
 				);
@@ -469,7 +468,6 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				FRAMEWORK_SEARCH_PATHS = (
-					"$(SDKROOT)/Developer/Library/Frameworks",
 					"$(inherited)",
 					"$(PROJECT_DIR)/Carthage/Build/iOS",
 				);