build: remove unused code from legacy tooling and View Engine

Removes unused code from legacy tooling and View Engine compilation
within Bazel.

Also the clang-format file is removed given that we run prettier
in the whole repository now.

Author: devversion

.clang-format

@@ -18,12 +18,3 @@ config_setting(
     name = "stamp",
     values = {"stamp": "true"},
 )
-
-# This file generates the `angular_ivy_enabled.js` file, which exports a truthy value
-# whether Ivy should be enabled based on the `--defined=angular_ivy_enabled` value
-# so runtime can detect which mode it is running in.
-genrule(
-    name = "angular_ivy_enabled",
-    outs = ["angular_ivy_enabled.js"],
-    cmd = "echo exports.ivyEnabled = \"'True' === '$(angular_ivy_enabled)'\"\\; > $@",
-)