fix(es/typescript): Don't generate class field for abstract properties (#6174)

crates/swc/tests/tsc-references/abstractProperty(target=es2015).1.normal.js

@@ -4,9 +4,6 @@ class A {
     foo() {
         console.log(this.x);
     }
-    constructor(){
-        _define_property(this, "x", void 0);
-    }
 }
 class B extends A {
     constructor(...args){

crates/swc/tests/tsc-references/abstractProperty(target=es2022).1.normal.js

@@ -1,6 +1,5 @@
 //// [abstractProperty.ts]
 class A {
-    x;
     foo() {
         console.log(this.x);
     }

crates/swc_ecma_transforms_typescript/src/strip.rs

@@ -1972,7 +1972,12 @@ where
             {
                 false
             }
-            ClassMember::ClassProp(ClassProp { declare: true, .. }) => false,
+            ClassMember::ClassProp(
+                ClassProp { declare: true, .. }
+                | ClassProp {
+                    is_abstract: true, ..
+                },
+            ) => false,
             ClassMember::ClassProp(ClassProp {
                 value: None,
                 ref decorators,

crates/swc_ecma_transforms_typescript/tests/strip.rs

@@ -4637,3 +4637,21 @@ test!(
     foo();
     "#
 );
+
+test_with_config!(
+    issue_6023,
+    strip::Config {
+        use_define_for_class_fields: true,
+        ..Default::default()
+    },
+    "
+    abstract class Shape {
+        abstract height: number;
+        abstract width: number;
+    }
+    ",
+    "
+    class Shape {
+    }
+    "
+);