[part 6] refactor!(telemetry): remove dependency on TracerTelemetry (#204)

Moves the TracerTelemetry logic directly into Telemetry, eliminating
the need for a separate `TracerTelemetry` object.

Author: dmehala

BUILD.bazel

@@ -43,7 +43,6 @@ cc_library(
       "src/datadog/tags.cpp",
       "src/datadog/threaded_event_scheduler.cpp",
       "src/datadog/tracer_config.cpp",
-      "src/datadog/tracer_telemetry.cpp",
       "src/datadog/tracer.cpp",
       "src/datadog/trace_id.cpp",
       "src/datadog/trace_sampler_config.cpp",
@@ -76,7 +75,6 @@ cc_library(
       "src/datadog/tag_propagation.h",
       "src/datadog/tags.h",
       "src/datadog/threaded_event_scheduler.h",
-      "src/datadog/tracer_telemetry.h",
       "src/datadog/trace_sampler.h",
       "src/datadog/w3c_propagation.h",
     ],

CMakeLists.txt

@@ -145,7 +145,6 @@ target_sources(dd_trace_cpp-objects
     src/datadog/tag_propagation.cpp
     src/datadog/threaded_event_scheduler.cpp
     src/datadog/tracer_config.cpp
-    src/datadog/tracer_telemetry.cpp
     src/datadog/tracer.cpp
     src/datadog/trace_id.cpp
     src/datadog/trace_sampler_config.cpp