diff --git a/src/main/java/io/jenkins/plugins/prism/PrismTheme.java b/src/main/java/io/jenkins/plugins/prism/PrismTheme.java
index 68d6a09..e1d2693 100644
--- a/src/main/java/io/jenkins/plugins/prism/PrismTheme.java
+++ b/src/main/java/io/jenkins/plugins/prism/PrismTheme.java
@@ -2,7 +2,6 @@
 
 import hudson.util.ListBoxModel;
 import io.jenkins.plugins.thememanager.Theme;
-import io.jenkins.plugins.thememanager.ThemeManagerPageDecorator;
 
 /**
  * Defines the active theme to be used when rendering the source code with Prism.
@@ -53,17 +52,6 @@ public String getFileName(Theme theme) {
         return "prism-" + themeId + ".css";
     }
 
-    /**
-     * Use {@link #getFileName(Theme)} instead.
-     * You probably shouldn't be calling this directly though and should be calling
-     * {@link PrismConfiguration#getThemeCssFileName()}.
-     */
-    @Deprecated
-    public String getFileName() {
-        Theme theme = ThemeManagerPageDecorator.get().findTheme();
-        return getFileName(theme);
-    }
-
     /**
      * Returns all available themes in a {@link ListBoxModel}.
      *