remove

things/angular/install-npm.sh

 #!/bin/bash
 npm install --save \
 	bootstrap \
-	@ng-bootstrap/ng-bootstrap \
-	open-iconic
+	@ng-bootstrap/ng-bootstrap
 
 npm install --save-dev \
 	'@typescript-eslint/eslint-plugin@^4.28.2' \

things/angular/src/styles.css

 /* You can add global styles to this file, and also import other style files */
 @import '~bootstrap';
-@import '~open-iconic/font/css/open-iconic-bootstrap.css';
 
 body {
   min-height: 100vh;