Remove bp2build and bazel from soong_ui

Bug: 315353489
Test: m blueprint_tests
Change-Id: I9df31b18caaae24e3cf2994e56bb90b50523f11e

ui/build/Android.bp

@@ -46,7 +46,6 @@ bootstrap_go_package {
         "soong-ui-tracer",
     ],
     srcs: [
-        "bazel_metrics.go",
         "build.go",
         "cleanbuild.go",
         "config.go",
@@ -75,7 +74,6 @@ bootstrap_go_package {
         "proc_sync_test.go",
         "rbe_test.go",
         "staging_snapshot_test.go",
-        "upload_test.go",
         "util_test.go",
     ],
     darwin: {