Drop unused dependencies as reported by unused_deps.

unused_deps inspects the JAR files consumed by the compiler and compares
those to the declared dependencies.  This gets rid of a lot of unnecessary
dependencies but is not perfect given that java_export rules are invisible
to this process.

RELNOTES: None.
PiperOrigin-RevId: 242783900

src/main/java/com/google/devtools/build/lib/skyframe/serialization/BUILD

diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/serialization/BUILD b/src/main/java/com/google/devtools/build/lib/skyframe/serialization/BUILD
index c327a73..ee7ea9a 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/serialization/BUILD
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/serialization/BUILD
@@ -19,7 +19,6 @@
         "//src/main/java/com/google/devtools/build/lib/skyframe/serialization/autocodec:registered-singleton",
         "//src/main/java/com/google/devtools/build/lib/unsafe:string",
         "//src/main/java/com/google/devtools/build/lib/unsafe:unsafe-provider",
-        "//src/main/java/com/google/devtools/build/skyframe:skyframe-objects",
         "//third_party:guava",
         "//third_party:jsr305",
         "//third_party/protobuf:protobuf_java",