remove leftover wintoast dep file

deps/premake/wintoast.lua

@@ -1,32 +0,0 @@
-wintoast = {
-	source = path.join(dependencies.basePath, "WinToast"),
-}
-
-function wintoast.import()
-	links { "WinToast" }
-	wintoast.includes()
-end
-
-function wintoast.includes()
-	includedirs {
-		path.join(wintoast.source, "include"),
-	}
-end
-
-function wintoast.project()
-	project "WinToast"
-		language "C++"
-
-		wintoast.includes()
-		rapidjson.import();
-
-		files {
-			path.join(wintoast.source, "include/wintoastlib.h"),
-			path.join(wintoast.source, "src/wintoastlib.cpp"),
-		}
-
-		warnings "Off"
-		kind "StaticLib"
-end
-
-table.insert(dependencies, wintoast)