diff --git a/lib/ExternalModule.js b/lib/ExternalModule.js
index 1499ac813..8ecc88e36 100644
--- a/lib/ExternalModule.js
+++ b/lib/ExternalModule.js
@@ -737,12 +737,6 @@ class ExternalModule extends Module {
 			case "this":
 				this.buildInfo.strict = false;
 				break;
-			case "system":
-				if (!Array.isArray(request) || request.length === 1) {
-					this.buildMeta.exportsType = "namespace";
-					canMangle = true;
-				}
-				break;
 			case "module":
 				if (this.buildInfo.javascriptModule) {
 					if (!Array.isArray(request) || request.length === 1) {
diff --git a/lib/library/SystemLibraryPlugin.js b/lib/library/SystemLibraryPlugin.js
index 380962091..6b1da6514 100644
--- a/lib/library/SystemLibraryPlugin.js
+++ b/lib/library/SystemLibraryPlugin.js
@@ -146,14 +146,6 @@ class SystemLibraryPlugin extends AbstractLibraryPlugin {
 										}
 									}
 									if (!otherUnused) {
-										if (
-											!Array.isArray(module.request) ||
-											module.request.length === 1
-										) {
-											externalVarInitialization.push(
-												`Object.defineProperty(${external}, "__esModule", { value: true });`
-											);
-										}
 										if (handledNames.length > 0) {
 											const name = `${external}handledNames`;
 											externalVarInitialization.push(