probes_producer: Fix system trace format

Remove extra / for format in TracePacket

Bug: 73625480
Change-Id: Ia616f62f0a4fdb52f82bd284591ad7816a2a166b
diff --git a/src/traced/probes/probes_producer.cc b/src/traced/probes/probes_producer.cc
index 5d29fd9..b460971 100644
--- a/src/traced/probes/probes_producer.cc
+++ b/src/traced/probes/probes_producer.cc
@@ -188,7 +188,7 @@
   auto trace_writer = endpoint_->CreateTraceWriter(
       static_cast<BufferID>(source_config.target_buffer()));
   if (system_inodes_.empty())
-    CreateStaticDeviceToInodeMap("/system/", &system_inodes_);
+    CreateStaticDeviceToInodeMap("/system", &system_inodes_);
   auto file_map_source =
       std::unique_ptr<InodeFileDataSource>(new InodeFileDataSource(
           session_id, &system_inodes_, &cache_, std::move(trace_writer)));