Revert of Introduce mojo interface for collecting StackSamplingProfiler data

base/profiler/stack_sampling_profiler.cc

Index: base/profiler/stack_sampling_profiler.cc
diff --git a/base/profiler/stack_sampling_profiler.cc b/base/profiler/stack_sampling_profiler.cc
index 10639759f6fa3d188fad9c8df5cb58823ab46f60..3d4979ca0bf49b9541737e23b4584e7d8b49c69a 100644
--- a/base/profiler/stack_sampling_profiler.cc
+++ b/base/profiler/stack_sampling_profiler.cc
@@ -101,9 +101,7 @@
 
 StackSamplingProfiler::Frame::~Frame() {}
 
-StackSamplingProfiler::Frame::Frame()
-    : instruction_pointer(0), module_index(kUnknownModuleIndex) {
-}
+StackSamplingProfiler::Frame::Frame() {}
 
 // StackSamplingProfiler::CallStackProfile ------------------------------------
 
@@ -277,12 +275,6 @@
 
 // StackSamplingProfiler::Frame global functions ------------------------------
 
-bool operator==(const StackSamplingProfiler::Module& a,
-                const StackSamplingProfiler::Module& b) {
-  return a.base_address == b.base_address && a.id == b.id &&
-      a.filename == b.filename;
-}
-
 bool operator==(const StackSamplingProfiler::Frame &a,
                 const StackSamplingProfiler::Frame &b) {
   return a.instruction_pointer == b.instruction_pointer &&