AppRunner: Fix process restart

Wait will always return an error as we just killed the process

Change-Id: I329b25811a3c7502d7e3ebe964acbe14ae14d1dc
diff --git a/apps/app-runner/server.go b/apps/app-runner/server.go
index 8095a4b..b906e7b 100644
--- a/apps/app-runner/server.go
+++ b/apps/app-runner/server.go
@@ -82,12 +82,9 @@
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
-		err = s.cmd.Wait()
+		// NOTE(gio): No need to check err as we just killed the process
+		s.cmd.Wait()
 		s.cmd = nil
-		if err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
 	}
 	if err := os.RemoveAll(s.appDir); err != nil {
 		http.Error(w, err.Error(), http.StatusInternalServerError)