remove outdated lint (#1111)

bindings/wasm/build/lints.js

@@ -1,35 +1,3 @@
-/**
- * Rejects any `<obj>.ptr = 0;` occurrence, excluding `this.ptr = 0;` in `free()` implementations.
- *
- * Prevents generated code that nulls out Wasm pointers without de-registering the finalizer, since they cause
- * runtime errors during automatic garbage collection from WasmRefCell thinking the instance is still borrowed.
- *
- * Functions which take owned parameters cause this situation; the solution is to borrow and clone the parameter
- * instead.
- */
-function lintPtrNullWithoutFree(content) {
-    // Find line numbers of offending code.
-    const lines = content.split(/\r?\n/);
-    const matches = lines.flatMap(function(line, number) {
-        if (/(?<!this).ptr = 0;/.test(line)) {
-            return [(number + 1) + " " + line.trim()];
-        } else {
-            return [];
-        }
-    });
-    if (matches.length > 0) {
-        throw (`ERROR: generated Javascript should not include 'obj.ptr = 0;'. 
-When weak references are enabled with '--weak-refs', WasmRefCell in wasm-bindgen causes 
-runtime errors from automatic garbage collection trying to free objects taken as owned parameters. 
-
-Matches:
-${matches}
-
-SUGGESTION: change any exported functions which take an owned parameter (excluding flat enums) to use a borrow instead.
-See: https://github.com/rustwasm/wasm-bindgen/pull/2677`);
-    }
-}
-
 /** Rejects any `imports['env']` occurrences, which cause failures at runtime.
  *
  *  This is typically due to Wasm compatibility features not being enabled on crate dependencies. **/
@@ -66,7 +34,6 @@ See:
 /** Runs all custom lints on the generated code. Exits the process immediately with code 1 if any fail. **/
 function lintAll(content) {
     try {
-        lintPtrNullWithoutFree(content);
         lintImportEnv(content);
     } catch (err) {
         console.error("Custom lint failed!");