Migrate from common_internal::SharedByteString to common_internal::ByteString

PiperOrigin-RevId: 731010478

Author: jcking

common/BUILD

@@ -595,9 +595,8 @@ cc_library(
         ":value_kind",
         "//base:attributes",
         "//base/internal:message_wrapper",
-        "//common/internal:arena_string",
+        "//common/internal:byte_string",
         "//common/internal:reference_count",
-        "//common/internal:shared_byte_string",
         "//eval/internal:cel_value_equal",
         "//eval/public:cel_value",
         "//eval/public:message_wrapper",

common/internal/BUILD

@@ -14,12 +14,6 @@
 
 package(default_visibility = ["//visibility:public"])
 
-cc_library(
-    name = "arena_string",
-    hdrs = ["arena_string.h"],
-    deps = ["@com_google_absl//absl/strings:string_view"],
-)
-
 cc_library(
     name = "casting",
     hdrs = ["casting.h"],
@@ -61,41 +55,6 @@ cc_test(
     ],
 )
 
-cc_library(
-    name = "shared_byte_string",
-    srcs = ["shared_byte_string.cc"],
-    hdrs = ["shared_byte_string.h"],
-    deps = [
-        ":arena_string",
-        ":reference_count",
-        "//common:allocator",
-        "//common:memory",
-        "@com_google_absl//absl/base",
-        "@com_google_absl//absl/base:core_headers",
-        "@com_google_absl//absl/base:nullability",
-        "@com_google_absl//absl/functional:overload",
-        "@com_google_absl//absl/log:absl_check",
-        "@com_google_absl//absl/meta:type_traits",
-        "@com_google_absl//absl/strings:cord",
-        "@com_google_absl//absl/strings:string_view",
-        "@com_google_absl//absl/types:optional",
-        "@com_google_protobuf//:protobuf",
-    ],
-)
-
-cc_test(
-    name = "shared_byte_string_test",
-    srcs = ["shared_byte_string_test.cc"],
-    deps = [
-        ":reference_count",
-        ":shared_byte_string",
-        "//internal:testing",
-        "@com_google_absl//absl/hash",
-        "@com_google_absl//absl/strings:cord",
-        "@com_google_absl//absl/strings:string_view",
-    ],
-)
-
 cc_library(
     name = "metadata",
     hdrs = ["metadata.h"],