Remove old tracing code now that it has moved to third_party.

chrome/browser/resources/tracing/tests/instance_counters.json

Index: chrome/browser/resources/tracing/tests/instance_counters.json
diff --git a/chrome/browser/resources/tracing/tests/instance_counters.json b/chrome/browser/resources/tracing/tests/instance_counters.json
deleted file mode 100644
index 4a2f2215f9ffc47995517c62d3615b4abe22e448..0000000000000000000000000000000000000000
--- a/chrome/browser/resources/tracing/tests/instance_counters.json
+++ /dev/null
@@ -1,28 +0,0 @@
-[
-  {"name": "a", "args": {},"pid": 52, "ts": 9524, "cat": "foo", "tid": 53,
-      "ph": "B"},
-  {"name": "a", "args": {},"pid": 52, "ts": 9560, "cat": "foo", "tid": 53,
-      "ph": "E"},
-  {"name": "b", "args": {},"pid": 52, "ts": 9629, "cat": "foo", "tid": 53,
-      "ph": "B"},
-  {"name": "b", "args": {},"pid": 52, "ts": 9631, "cat": "foo", "tid": 53,
-      "ph": "E"},
-
-  {"name": "counter", "args": {"value": 2}, "pid": 52, "ts": 9524,
-      "cat": "foo", "tid": 53, "ph": "C", "id": "123"},
-  {"name": "counter", "args": {"value": 10}, "pid": 52, "ts": 9626,
-      "cat": "foo", "tid": 53, "ph": "C", "id": "123"},
-  {"name": "counter", "args": {"value": 5}, "pid": 52, "ts": 9627,
-      "cat": "foo", "tid": 53, "ph": "C", "id": "123"},
-  {"name": "counter", "args": {"value": 8}, "pid": 52, "ts": 9628,
-      "cat": "foo", "tid": 53, "ph": "C", "id": "123"},
-  {"name": "counter", "args": {"value": 4}, "pid": 52, "ts": 9629,
-      "cat": "foo", "tid": 53, "ph": "C", "id": "123"},
-  {"name": "counter", "args": {"value": 10}, "pid": 52, "ts": 9631,
-      "cat": "foo", "tid": 53, "ph": "C", "id": "123"},
-
-  {"name": "counter", "args": {"value": 10}, "pid": 52, "ts": 9524,
-      "cat": "foo", "tid": 53, "ph": "C", "id": "b"},
-  {"name": "counter", "args": {"value": 0}, "pid": 52, "ts": 9631,
-      "cat": "foo", "tid": 53, "ph": "C", "id": "b"}
-]