test(material/stepper): combine shared tests

Since we only have one module, we don't need separate shared tests anymore.

Author: crisbeto

src/material/stepper/testing/BUILD.bazel

@@ -19,8 +19,8 @@ filegroup(
 )
 
 ng_test_library(
-    name = "harness_tests_lib",
-    srcs = ["shared.spec.ts"],
+    name = "unit_tests_lib",
+    srcs = glob(["**/*.spec.ts"]),
     deps = [
         ":testing",
         "//src/cdk/stepper",
@@ -33,19 +33,6 @@ ng_test_library(
     ],
 )
 
-ng_test_library(
-    name = "unit_tests_lib",
-    srcs = glob(
-        ["**/*.spec.ts"],
-        exclude = ["shared.spec.ts"],
-    ),
-    deps = [
-        ":harness_tests_lib",
-        ":testing",
-        "//src/material/stepper",
-    ],
-)
-
 ng_web_test_suite(
     name = "unit_tests",
     deps = [":unit_tests_lib"],