Fix "directory not found" linker warnings on OS X

- Remove paths that don't appear to exist and don't
  appear necessary anyway as the Release folder has
  all the libraries needed. Everything still builds alright
  so I think this looks okay.

IDE/Build/Mac OS X/Polycode.xcodeproj/project.pbxproj

@@ -503,17 +503,6 @@
 				INSTALL_PATH = "$(HOME)/Applications";
 				LIBRARY_SEARCH_PATHS = (
 					"$(inherited)",
-					"\"$(SRCROOT)/../../../Core/Build/Mac OS X/build/Debug\"",
-					"\"$(SRCROOT)/../../../Core/Dependencies/libpng/projects/xcode/build/Release\"",
-					"\"$(SRCROOT)/../../../Core/Dependencies/physfs/Release\"",
-					"\"$(SRCROOT)/../../../Core/Dependencies/zlib/projects/xcode/Untitled/build/Debug\"",
-					"\"$(SRCROOT)/../../../Core/Dependencies/freetype\"",
-					"\"$(SRCROOT)/../../../Core/Dependencies/physfs/XcodeProject/physfs/build/Debug\"",
-					"\"$(SRCROOT)/../../../Core/Dependencies/physfs/Debug\"",
-					"\"$(SRCROOT)/../../../Modules/Build/Mac OS X/build/Debug\"",
-					"\"$(SRCROOT)/../../../Core/Dependencies/zlib\"",
-					"\"$(SRCROOT)/../../../Core/Dependencies/libpng\"",
-					"\"$(SRCROOT)/../../../Core/Dependencies/luajit/src\"",
 					"\"$(SRCROOT)/../../../Release/Darwin/Framework/Core/lib\"",
 					"\"$(SRCROOT)/../../../Release/Darwin/Framework/Core/Dependencies/lib\"",
 					"\"$(SRCROOT)/../../../Release/Darwin/Framework/Modules/lib\"",
@@ -542,17 +531,6 @@
 				INSTALL_PATH = "$(HOME)/Applications";
 				LIBRARY_SEARCH_PATHS = (
 					"$(inherited)",
-					"\"$(SRCROOT)/../../../Core/Build/Mac OS X/build/Debug\"",
-					"\"$(SRCROOT)/../../../Core/Dependencies/libpng/projects/xcode/build/Release\"",
-					"\"$(SRCROOT)/../../../Core/Dependencies/physfs/Release\"",
-					"\"$(SRCROOT)/../../../Core/Dependencies/zlib/projects/xcode/Untitled/build/Debug\"",
-					"\"$(SRCROOT)/../../../Core/Dependencies/freetype\"",
-					"\"$(SRCROOT)/../../../Core/Dependencies/physfs/XcodeProject/physfs/build/Debug\"",
-					"\"$(SRCROOT)/../../../Core/Dependencies/physfs/Debug\"",
-					"\"$(SRCROOT)/../../../Modules/Build/Mac OS X/build/Debug\"",
-					"\"$(SRCROOT)/../../../Core/Dependencies/zlib\"",
-					"\"$(SRCROOT)/../../../Core/Dependencies/libpng\"",
-					"\"$(SRCROOT)/../../../Core/Dependencies/luajit/src\"",
 					"\"$(SRCROOT)/../../../Release/Darwin/Framework/Core/lib\"",
 					"\"$(SRCROOT)/../../../Release/Darwin/Framework/Core/Dependencies/lib\"",
 					"\"$(SRCROOT)/../../../Release/Darwin/Framework/Modules/lib\"",