fix: remove dummy golden_update tests (#364)

* fix: use imperative bazel rule names

* fix: refactor and fix bazel golden_update rules

* fix: remove dummy golden_update tests

Author: miraleung

BUILD.bazel

@@ -46,7 +46,6 @@ java_binary(
     ],
 )
 
-
 # google-java-format
 java_binary(
     name = "google_java_format_binary",

src/test/java/com/google/api/generator/gapic/BUILD.bazel

@@ -4,7 +4,6 @@ filegroup(
     name = "gapic_files",
     srcs = [
         "//src/test/java/com/google/api/generator/gapic/composer:composer_files",
-        "//src/test/java/com/google/api/generator/gapic/dummy:dummy_files",
         "//src/test/java/com/google/api/generator/gapic/model:model_files",
         "//src/test/java/com/google/api/generator/gapic/protoparser:protoparser_files",
         "//src/test/java/com/google/api/generator/gapic/utils:utils_files",