Revert GitHub repo telemetry collection (#1091)

We decided that while this data would be very useful to us, it isn't worth potential privacy concerns.

Author: dan-shaw

include/vcpkg/metrics.h

@@ -60,7 +60,6 @@ namespace vcpkg
         CommandName,
         DeploymentKind,
         DetectedCiEnvironment,
-        GithubRepo,
         InstallPlan_1,
         ListFile,
         ProcessTree,

src/vcpkg/metrics.cpp

@@ -133,9 +133,6 @@ namespace vcpkg
         {StringMetric::CommandName, "command_name", "z-preregister-telemetry"},
         {StringMetric::DeploymentKind, "deployment_kind", "Git"},
         {StringMetric::DetectedCiEnvironment, "detected_ci_environment", "Generic"},
-        {StringMetric::GithubRepo,
-         "github_repo_hash",
-         "0000000011111111aaaaaaaabbbbbbbbccccccccddddddddeeeeeeeeffffffff"},
         // spec:triplet:version,...
         {StringMetric::InstallPlan_1, "installplan_1", plan_example},
         {StringMetric::ListFile, "listfile", "update to new format"},

src/vcpkg/vcpkgcmdarguments.cpp

@@ -1,4 +1,3 @@
-#include <vcpkg/base/hash.h>
 #include <vcpkg/base/json.h>
 #include <vcpkg/base/system.debug.h>
 #include <vcpkg/base/system.h>
@@ -685,20 +684,11 @@ namespace vcpkg
 
     void VcpkgCmdArguments::track_environment_metrics() const
     {
-        MetricsSubmission submission;
         if (auto ci_env = m_detected_ci_environment.get())
         {
             Debug::println("Detected CI environment: ", *ci_env);
-            submission.track_string(StringMetric::DetectedCiEnvironment, *ci_env);
+            get_global_metrics_collector().track_string(StringMetric::DetectedCiEnvironment, *ci_env);
         }
-
-        if (auto gh_repo = github_repository.get())
-        {
-            auto gh_repo_hash = Hash::get_string_hash(*gh_repo, Hash::Algorithm::Sha256);
-            Debug::println("Github repo: ", gh_repo_hash);
-            submission.track_string(StringMetric::GithubRepo, gh_repo_hash);
-        }
-        get_global_metrics_collector().track_submission(std::move(submission));
     }
 
     Optional<std::string> VcpkgCmdArguments::asset_sources_template() const