Revert "Add compile directive"

This reverts commit c720c7b27094671b6b4b7de6041268421a8d7c4d.
diff --git a/WebAssembly.asciidoc b/WebAssembly.asciidoc
index f522667..df1d864 100644
--- a/WebAssembly.asciidoc
+++ b/WebAssembly.asciidoc
@@ -36,8 +36,6 @@
 To compile a basic Go package for the web:
 
 ```go
-// +build js,wasm
-
 package main
 
 import "fmt"