Simplify writeDiffRangeDataExtensionPack interface

lib/analyze-action.js

@@ -110784,15 +110784,9 @@ async function setupDiffInformedQueryRun(logger) {
         diffRanges,
         checkoutPath
       );
-      if (packDir === void 0) {
-        logger.warning(
-          "Cannot create diff range extension pack for diff-informed queries; reverting to performing full analysis."
-        );
-      } else {
-        logger.info(
-          `Successfully created diff range extension pack at ${packDir}.`
-        );
-      }
+      logger.info(
+        `Successfully created diff range extension pack at ${packDir}.`
+      );
       return packDir;
     }
   );
@@ -110817,9 +110811,6 @@ extensions:
   return header + data;
 }
 function writeDiffRangeDataExtensionPack(logger, ranges, checkoutPath) {
-  if (ranges === void 0) {
-    return void 0;
-  }
   if (ranges.length === 0) {
     ranges = [{ path: "", startLine: 0, endLine: 0 }];
   }