remove examples from BUILD

Author: andrewseguin

src/e2e-app/BUILD.bazel

@@ -32,7 +32,6 @@ ng_module(
         "//src/cdk/scrolling",
         "//src/cdk/testing/tests:test_components",
         "//src/components-examples/material-experimental/mdc-card",
-        "//src/components-examples/material/slider",
         "//src/components-examples/private",
         "//src/material-experimental/mdc-button",
         "//src/material-experimental/mdc-card",