Revert of Create libsampler as V8 sampler library.

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index d61297f6aed9dd94443cb7039014e5426216348e..6b2408e3f15da55234a5a33608a3b7dde7e9f32e 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -102,11 +102,6 @@
 
 # This config should be applied to code using the libplatform.
 config("libplatform_config") {
-  include_dirs = [ "include" ]
-}
-
-# This config should be applied to code using the libsampler.
-config("libsampler_config") {
   include_dirs = [ "include" ]
 }
 
@@ -1334,6 +1329,8 @@
     "src/profiler/profile-generator-inl.h",
     "src/profiler/profile-generator.cc",
     "src/profiler/profile-generator.h",
+    "src/profiler/sampler.cc",
+    "src/profiler/sampler.h",
     "src/profiler/sampling-heap-profiler.cc",
     "src/profiler/sampling-heap-profiler.h",
     "src/profiler/strings-storage.cc",
@@ -1817,7 +1814,6 @@
   defines = []
   deps = [
     ":v8_libbase",
-    ":v8_libsampler",
   ]
 
   if (is_win) {
@@ -1972,23 +1968,6 @@
   ]
 }
 
-v8_source_set("v8_libsampler") {
-  sources = [
-    "src/libsampler/hashmap.h",
-    "src/libsampler/utils.h",
-    "src/libsampler/v8-sampler.cc",
-    "src/libsampler/v8-sampler.h",
-  ]
-
-  configs = [ ":internal_config_base" ]
-
-  public_configs = [ ":libsampler_config" ]
-
-  deps = [
-    ":v8_libbase",
-  ]
-}
-
 v8_source_set("fuzzer_support") {
   visibility = [ ":*" ]  # Only targets in this file can depend on this.