feat(theme): pageManage css variables change

Author: wenmine

packages/theme/dark/pageManage.less

@@ -1,12 +1,8 @@
 :root {
   --ti-lowcode-page-manage-title-background-text-color: var(--te-common-text-primary);
   --ti-lowcode-page-manage-tip-text-color: var(--te-common-text-weaken);
-  --ti-lowcode-page-manage-icon-text-color: var(--te-common-text-secondary);
   --ti-lowcode-page-manage-tree-text-background-color: var(--te-common-bg-default);
   --ti-lowcode-page-manage-tree-node-background-color: var(--te-common-bg-default);
   --ti-lowcode-page-manage-text-color: var(--te-common-text-secondary);
   --ti-lowcode-page-manage-input-head-text-color: var(--te-common-text-primary);
-  --ti-lowcode-page-manage-btn-text-color: var(--te-common-text-weaken);
-  --ti-lowcode-page-manage-error-color: var(--te-common-color-error);
-  --ti-lowcode-page-manage-input-group-color: var(--te-common-bg-default);
 }