fix: volk xmake file get two on_install funciton (#183)

volk xmake get two on_install function, delete unused function.

log: fix packages/v/volk/xmake.lua

packages/v/volk/xmake.lua

@@ -13,10 +13,6 @@ package("volk")
         add_syslinks("dl")
     end
 
-    on_install("windows", "linux", "macosx", function (package)
-        import("package.tools.cmake").install(package)
-    end)
-
     on_install("windows", "linux", "macosx", function (package)
         local configs = {}
         if package:config("shared") then