private static void removeInitializers(PsiClass targetClass) {
    final PsiClassInitializer[] initializers = targetClass.getInitializers();
    for (PsiClassInitializer initializer : initializers) {
      if (!initializer.hasModifierProperty(PsiModifier.STATIC)) initializer.delete();
    }
    final PsiField[] fields = targetClass.getFields();
    for (PsiField field : fields) {
      PsiExpression initializer = field.getInitializer();
      if (!field.hasModifierProperty(PsiModifier.STATIC) && initializer != null) {
        initializer.delete();
      }
    }
  }
private static void removeInitializers(PsiClass targetClass)