wipe out macports reference in Xcode project - no longer necessary

platform/macosx/love.xcodeproj/project.pbxproj

@@ -1679,7 +1679,6 @@
 				LIBRARY_SEARCH_PATHS = (
 					"$(inherited)",
 					"\"$(SRCROOT)\"",
-					/opt/local/lib,
 				);
 				PRODUCT_NAME = love;
 			};
@@ -1702,7 +1701,6 @@
 				LIBRARY_SEARCH_PATHS = (
 					"$(inherited)",
 					"\"$(SRCROOT)\"",
-					/opt/local/lib,
 				);
 				ONLY_ACTIVE_ARCH = NO;
 				PRODUCT_NAME = love;