[wasm] Allocate a single script per wasm module

src/debug/debug.js

Index: src/debug/debug.js
diff --git a/src/debug/debug.js b/src/debug/debug.js
index daa1acad864f274f4c196d41dcc1be51a3a41076..8031763a13909b6f693720a2df8182c1a92548a5 100644
--- a/src/debug/debug.js
+++ b/src/debug/debug.js
@@ -858,16 +858,6 @@ Debug.debuggerFlags = function() {
   return debugger_flags;
 };
 
-Debug.getWasmFunctionOffsetTable = function(scriptId) {
-  var script = scriptById(scriptId);
-  return script ? %GetWasmFunctionOffsetTable(script) : UNDEFINED;
-}
-
-Debug.disassembleWasmFunction = function(scriptId) {
-  var script = scriptById(scriptId);
-  return script ? %DisassembleWasmFunction(script) : UNDEFINED;
-}
-
 Debug.MakeMirror = MakeMirror;
 
 function MakeExecutionState(break_id) {