Remove unused duplicate code and improve build configuration (#79)

* Initial plan

* Initial analysis of repository for unused code identification

Co-authored-by: trask <218610+trask@users.noreply.github.com>

* Remove duplicate sampling percentage logic from SecondEntryPoint

Co-authored-by: trask <218610+trask@users.noreply.github.com>

* Add Kotlin build artifacts to .gitignore and remove committed build artifact

Co-authored-by: trask <218610+trask@users.noreply.github.com>

* Revert .gitignore changes as requested

Co-authored-by: trask <218610+trask@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: trask <218610+trask@users.noreply.github.com>
Co-authored-by: Trask Stalnaker <trask.stalnaker@gmail.com>

Author: Copilot

agent/agent-tooling/src/main/java/com/microsoft/applicationinsights/agent/internal/init/SecondEntryPoint.java

@@ -166,20 +166,13 @@ public void customize(AutoConfigurationCustomizer autoConfiguration) {
 
     TelemetryClient.setActive(telemetryClient);
 
-    // TODO (heya) remove duplicate code in both RuntimeConfigurator and SecondEntryPoint
     RuntimeConfigurator runtimeConfigurator =
         new RuntimeConfigurator(
             telemetryClient,
             () -> logFilteringProcessor,
             configuration,
             heartbeatTelemetryItemConsumer,
             tempDir);
-
-    if (configuration.sampling.percentage != null) {
-      BytecodeUtilImpl.samplingPercentage = configuration.sampling.percentage.floatValue();
-    } else {
-      BytecodeUtilImpl.samplingPercentage = 100;
-    }
     BytecodeUtilImpl.featureStatsbeat = statsbeatModule.getFeatureStatsbeat();
     BytecodeUtilImpl.runtimeConfigurator = runtimeConfigurator;
     BytecodeUtilImpl.connectionStringConfiguredAtRuntime =