update windows toolchain and platform.txt

cores/esp32/main.cpp

@@ -19,40 +19,3 @@ extern "C" void app_main()
 }
 
 #endif
-
-/*
-**  Block below to be removed with next toolchain
-*/
-void *operator new(size_t size)
-{
-    return malloc(size);
-}
-
-void *operator new[](size_t size)
-{
-    return malloc(size);
-}
-
-void operator delete(void * ptr)
-{
-    free(ptr);
-}
-
-void operator delete[](void * ptr)
-{
-    free(ptr);
-}
-
-extern "C" void __cxa_pure_virtual(void) __attribute__ ((__noreturn__));
-extern "C" void __cxa_deleted_virtual(void) __attribute__ ((__noreturn__));
-
-void __cxa_pure_virtual(void)
-{
-    abort();
-}
-
-void __cxa_deleted_virtual(void)
-{
-    abort();
-}
-