simpleperf: stat: remove percentage in csv output.

Because percentage isn't correct after we open an event for each cpu.

Bug: 243065368
Bug: 243479304
Test: run simpleperf_unit_test
Change-Id: I67bc23594e82afce040de7755deb9b274b8ad8b8
(cherry picked from commit abc8ee2e0f792d24562405159ae46be19a1c8acb)
diff --git a/simpleperf/cmd_stat.cpp b/simpleperf/cmd_stat.cpp
index bd2cc5e..bd1bffb 100644
--- a/simpleperf/cmd_stat.cpp
+++ b/simpleperf/cmd_stat.cpp
@@ -141,8 +141,8 @@
     if (show_cpu) {
       fprintf(fp, "%d,", s.cpu);
     }
-    fprintf(fp, "%s,%s,%s,(%.0f%%)%s\n", s.readable_count.c_str(), s.Name().c_str(),
-            s.comment.c_str(), 1.0 / s.scale * 100, (s.auto_generated ? " (generated)," : ","));
+    fprintf(fp, "%s,%s,%s,%s\n", s.readable_count.c_str(), s.Name().c_str(), s.comment.c_str(),
+            (s.auto_generated ? "(generated)," : ""));
   }
 }