Simplify `java_common.bzl`

This is change 2/N of dismantling `@compatibility_proxy`

(ignore-relnotes)

PiperOrigin-RevId: 1008687698
Change-Id: I6864c8821f22816fea36ce7191859e836dbcb643

java/common/java_common.bzl

diff --git a/java/common/java_common.bzl b/java/common/java_common.bzl
index ed55bdb..2b96abb 100644
--- a/java/common/java_common.bzl
+++ b/java/common/java_common.bzl
@@ -13,6 +13,6 @@
 # limitations under the License.
 """java_common module"""
 
-load("@compatibility_proxy//:proxy.bzl", _java_common = "java_common")
+load("//java/private:java_common.bzl", _java_common = "java_common")
 
 java_common = _java_common