diff --git a/tools/code-coverage/nsCodeCoverage.cpp b/tools/code-coverage/nsCodeCoverage.cpp
--- a/tools/code-coverage/nsCodeCoverage.cpp
+++ b/tools/code-coverage/nsCodeCoverage.cpp
@@ -62,28 +62,6 @@
     CodeCoverageHandler::FlushCounters();
   }
 
-  if (processCount == 0) {
-    promise->MaybeResolveWithUndefined();
-  } else {
-    RefPtr<ProcessCount> processCountHolder(new ProcessCount(processCount));
-
-    auto resolve = [processCountHolder, promise](bool unused) {
-      if (--(*processCountHolder) == 0) {
-        promise->MaybeResolveWithUndefined();
-      }
-    };
-
-    auto reject = [promise](ResponseRejectReason&& aReason) {
-      promise->MaybeReject(NS_ERROR_FAILURE);
-    };
-
-    for (auto* cp : ContentParent::AllProcesses(ContentParent::eLive)) {
-      if (requestType == RequestType::Flush) {
-        cp->SendFlushCodeCoverageCounters(resolve, reject);
-      }
-    }
-  }
-
   promise.forget(aPromise);
   return NS_OK;
 }