fix: remove redundant optional chaining in toString call

The null check on line 282 already ensures issueNumberValue is not null,
so the optional chaining operators on toString() and trim() are unnecessary.

As noted by Copilot code review.

Author: Qbandev

.github/scripts/remove-rca-needed-label-sheets.ts

@@ -282,7 +282,7 @@ async function fetchRcaResponses(sheets: SheetsV4): Promise<RcaFormResponse[]> {
       if (issueNumberValue != null) {
         // Extract just the numeric part from the issue number
         // Handles formats like: "18454", "#18454", or leading/trailing whitespace
-        const trimmedValue = issueNumberValue?.toString()?.trim();
+        const trimmedValue = issueNumberValue.toString().trim();
         if (!trimmedValue) {
           continue; // Skip if empty string after trimming
         }