Update legacy workflow PR check

We now trace in init when using reconciled tracing, so we no longer need
to set the `CODEQL_EXTRACTOR_GO_BUILD_TRACING` environment variable.

Author: henrymercer

.github/workflows/__go-reconciled-tracing-legacy-workflow.yml

@@ -4,8 +4,6 @@ os: ["ubuntu-latest", "macos-latest"]
 env:
   # Enable reconciled Go tracing beta functionality
   CODEQL_ACTION_RECONCILE_GO_EXTRACTION: "true"
-  # Remove this once we start injecting the Go tracer in the init step.
-  CODEQL_EXTRACTOR_GO_BUILD_TRACING: "on"
   DOTNET_GENERATE_ASPNET_CERTIFICATE: "false"
 steps:
   - uses: actions/setup-go@v3