删除无用例子

internal/backends/compiler_wat/t/global.wa

-# 版权 @2021 凹语言 作者。保留所有权利。
-
-package main
-
-#wa:linkname $heap_ptr
-var heap_ptr int32 = 2048
-#wa:linkname $waHeapAlloc
-fn HeapAlloc(size: i32) => (ptr: i32) {
-	ptr = heap_ptr
-	heap_ptr += size
-	return
-}
-
-#wa:linkname $waHeapFree
-fn HeapFree(ptr: i32) {
-	print('~')
-	println(ptr)
-}
-
-fn main() {
-	println(HeapAlloc(8))
-	println(HeapAlloc(8))
-	println(HeapAlloc(4))
-}

internal/backends/compiler_wat/t/ref.wa

-# 版权 @2021 凹语言 作者。保留所有权利。
-
-package main
-
-#wa:linkname $heap_ptr
-var heap_ptr int32 = 2048
-#wa:linkname $waHeapAlloc
-fn HeapAlloc(size: i32) => (ptr: i32) {
-	ptr = heap_ptr
-	heap_ptr += size
-	return
-}
-
-#wa:linkname $waHeapFree
-fn HeapFree(ptr: i32) {
-	print('~')
-	println(ptr)
-}
-
-fn new_int() => *i32 {
-	var i i32
-	i = 42
-	return &i
-}
-
-fn main() {
-	println(*new_int())
-	println(*new_int())
-}