Revert "build: fix missing amd module name for primary entry-point (#17757)" (#17772)

This reverts commit 49977f7.

Reverting because this commit breaks the local build for the release
packages. Will further investigate why, but for now we need to revert to
unblock doing a release.

Author: jelbourn

src/material/BUILD.bazel

@@ -14,7 +14,6 @@ load("//tools:defaults.bzl", "ng_package", "ts_library")
 ts_library(
     name = "material",
     srcs = ["index.ts"],
-    module_name = "@angular/material",
 )
 
 filegroup(