Revert "fix(as): compiler crashed when duplicate inner function declared in function body (#439)"

This reverts commit b4aa74c.

Author: Changqing-JING

assemblyscript/src/compiler.ts

@@ -7820,18 +7820,6 @@ export class Compiler extends DiagnosticEmitter {
     let sourceFunction = flow.targetFunction;
     let isNamed = declaration.name.text.length > 0;
     let isSemanticallyAnonymous = !isNamed || contextualType != Type.void;
-
-    // Check for duplicate named function declarations before creating the
-    // prototype, since registering a concrete element with a duplicate
-    // internalName would trigger an assertion error.
-    if (!isSemanticallyAnonymous) {
-      let existingLocal = flow.getScopedLocal(declaration.name.text);
-      if (existingLocal) {
-        this.error(DiagnosticCode.Duplicate_identifier_0, declaration.name.range, declaration.name.text);
-        return this.module.unreachable();
-      }
-    }
-
     let closureInfo = this.program.closureScanner.getClosureFunctionInfo(declaration);
     let prototype = new FunctionPrototype(
       isSemanticallyAnonymous