appveyor: no file types

.appveyor.yml

@@ -25,12 +25,9 @@ artifacts:
 
   - path: build\llvm\bin\keystone.dll
     name: keystone.dll
-    type: DLL
 
   - path: build\llvm\lib\keystone.lib
     name: keystone.lib
-    type: LIB
 
   - path: build\kstool\kstool.exe
     name: kstool.exe
-    type: EXE