refactor: Remove 'Included' billing message and simplify multiplier to 0. (#1611)

Author: ethanyhou

com.microsoft.copilot.eclipse.ui/src/com/microsoft/copilot/eclipse/ui/i18n/Messages.java

@@ -177,7 +177,6 @@ public final class Messages extends NLS {
   public static String chat_historyView_enterIcon_tooltip;
   public static String chat_historyView_editIcon_tooltip;
   public static String chat_historyView_deleteIcon_tooltip;
-  public static String model_billing_included;
   public static String model_billing_multiplier_suffix;
   public static String model_billing_multiplier_variable;
   public static String model_tooltip_quota;

com.microsoft.copilot.eclipse.ui/src/com/microsoft/copilot/eclipse/ui/i18n/messages.properties

@@ -134,7 +134,6 @@ chat_historyView_textTruncation_ellipsis=...
 chat_historyView_enterIcon_tooltip=Apply title changes
 chat_historyView_editIcon_tooltip=Edit conversation title
 chat_historyView_deleteIcon_tooltip=Delete conversation
-model_billing_included=Included
 model_billing_multiplier_suffix=x
 model_billing_multiplier_variable=Variable
 chat_filePicker_title=Search attachments

com.microsoft.copilot.eclipse.ui/src/com/microsoft/copilot/eclipse/ui/utils/ModelUtils.java

@@ -54,19 +54,15 @@ public static CopilotModel convertByokModelToCopilotModel(ByokModel byokModel) {
   }
 
   /**
-   * Formats the billing multiplier for display. If the multiplier is 0, returns "Included". Otherwise, returns the
-   * multiplier value with trailing zeros removed and an "x" suffix.
+   * Formats the billing multiplier for display. Returns the multiplier value with trailing zeros removed and an "x"
+   * suffix (e.g., "0x", "1x", "1.5x").
    *
    * @param multiplier the billing multiplier value
    * @return the formatted multiplier text
    */
   public static String formatBillingMultiplier(double multiplier) {
     BigDecimal multiplierValue = BigDecimal.valueOf(multiplier).stripTrailingZeros();
-    if (multiplierValue.toPlainString().equals("0")) {
-      return Messages.model_billing_included;
-    } else {
-      return multiplierValue.toPlainString() + Messages.model_billing_multiplier_suffix;
-    }
+    return multiplierValue.toPlainString() + Messages.model_billing_multiplier_suffix;
   }
 
   /**