Remove no-op setListener method from dumpstate listener

Bugreports using Bugreport API flow is stable, remove unused
legacy flow method: setListener.

* Remove DumpstateToken as it was only used by setListener.
* Remove listener_name_ and report_section_

Bug: 136066578
Test: Build and flash. Takes bugreport as expected.
Test: atest dumpstate_test
Test: `adb bugreport` works as expected.

Change-Id: I31d1795fa91275091950320c71f4cf085895e4e0
diff --git a/cmds/dumpstate/dumpstate.cpp b/cmds/dumpstate/dumpstate.cpp
index b87582e..7c03ccf 100644
--- a/cmds/dumpstate/dumpstate.cpp
+++ b/cmds/dumpstate/dumpstate.cpp
@@ -3686,13 +3686,11 @@
     if (listener_ != nullptr) {
         if (percent % 5 == 0) {
             // We don't want to spam logcat, so only log multiples of 5.
-            MYLOGD("Setting progress (%s): %d/%d (%d%%)\n", listener_name_.c_str(), progress, max,
-                   percent);
+            MYLOGD("Setting progress: %d/%d (%d%%)\n", progress, max, percent);
         } else {
             // stderr is ignored on normal invocations, but useful when calling
             // /system/bin/dumpstate directly for debuggging.
-            fprintf(stderr, "Setting progress (%s): %d/%d (%d%%)\n", listener_name_.c_str(),
-                    progress, max, percent);
+            fprintf(stderr, "Setting progress: %d/%d (%d%%)\n", progress, max, percent);
         }
 
         listener_->onProgress(percent);