refactor: remove unknown-class annotator and quick-fix

Since @import resolution is removed, class names may come from files we
cannot resolve. Warning annotations for "unknown" classes are misleading.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: Q-Peppa

src/main/kotlin/com/peppa/css/annotator/CssModulesClassAnnotator.kt

@@ -42,7 +42,5 @@
         <!-- supply completion  -->
         <completion.contributor language="JavaScript"
                                 implementationClass="com.peppa.css.completion.CssModulesClassNameCompletionContributor"/>
-        <!--   if not found reference ,  supply quick fix -->
-        <annotator language="JavaScript" implementationClass="com.peppa.css.annotator.CssModulesClassAnnotator"/>
     </extensions>
 </idea-plugin>