Prevent regression failures of cpp tests on windows.

Author: andreast271

appveyor.yml

@@ -86,6 +86,8 @@ test_script:
     rmdir /s /q cpp\Decltype1
     rmdir /s /q cpp\Decltype2
     rmdir /s /q cpp\Function_Overloading1
+    rmdir /s /q cpp\Function_Overloading2
+    rmdir /s /q cpp\Function_Overloading3
     rmdir /s /q cpp\enum2
     rmdir /s /q cpp\enum7
     rmdir /s /q cpp\enum8

regression/cpp/Resolver10/main.cpp

@@ -1,5 +1,3 @@
-#include <cassert>
-
 struct A
 {
   int i;

regression/cpp/Resolver11/main.cpp

@@ -1,5 +1,3 @@
-#include <cassert>
-
 struct A
 {
   bool func() { return false; }

regression/cpp/Template_Parameters1/main.cpp

@@ -1,5 +1,3 @@
-#include <cassert>
-
 // V depends on Ty
 template<typename Ty, Ty V>
 class T