Revert "build: Bazel builds ngfactories for packages/core (#18289)"

This reverts commit bcea196530.

packages/compiler/BUILD.bazel

@@ -1,13 +0,0 @@
-package(default_visibility=["//visibility:public"])
-load("@build_bazel_rules_typescript//:defs.bzl", "ts_library")
-
-ts_library(
-    name = "compiler",
-    srcs = glob(["**/*.ts"], exclude=[
-      "test/**",
-      "testing/**",
-    ]),
-    module_name = "@angular/compiler",
-    deps = ["//packages/core"],
-    tsconfig = ":tsconfig-build.json",
-)