ModuleGraph can get weak flag from dependency itself

lib/Compilation.js

@@ -1068,12 +1068,7 @@ class Compilation {
 
 					for (let i = 0; i < dependencies.length; i++) {
 						const dependency = dependencies[i];
-						moduleGraph.setResolvedModule(
-							originModule,
-							dependency,
-							module,
-							dependency.weak
-						);
+						moduleGraph.setResolvedModule(originModule, dependency, module);
 					}
 
 					moduleGraph.setIssuerIfUnset(

lib/ModuleGraph.js

@@ -710,16 +710,15 @@ class ModuleGraph {
 	 * @param {Module} originModule the referencing module
 	 * @param {Dependency} dependency the referencing dependency
 	 * @param {Module} module the referenced module
-	 * @param {boolean} weak the reference is weak
 	 * @returns {void}
 	 */
-	setResolvedModule(originModule, dependency, module, weak) {
+	setResolvedModule(originModule, dependency, module) {
 		const connection = new ModuleGraphConnection(
 			originModule,
 			dependency,
 			module,
 			undefined,
-			weak,
+			dependency.weak,
 			dependency.getCondition(this)
 		);
 		const mgd = this._getModuleGraphDependency(dependency);