Cleanup some unused dependencies.

PiperOrigin-RevId: 303864462
diff --git a/src/main/java/com/google/devtools/build/lib/pkgcache/BUILD b/src/main/java/com/google/devtools/build/lib/pkgcache/BUILD
index b446bcc..e095558 100644
--- a/src/main/java/com/google/devtools/build/lib/pkgcache/BUILD
+++ b/src/main/java/com/google/devtools/build/lib/pkgcache/BUILD
@@ -23,21 +23,14 @@
         "//src/main/java/com/google/devtools/build/lib/buildeventstream/proto:build_event_stream_java_proto",
         "//src/main/java/com/google/devtools/build/lib/cmdline",
         "//src/main/java/com/google/devtools/build/lib/cmdline:LabelValidator",
-        "//src/main/java/com/google/devtools/build/lib/collect",
         "//src/main/java/com/google/devtools/build/lib/collect/compacthashset",
-        "//src/main/java/com/google/devtools/build/lib/collect/nestedset",
         "//src/main/java/com/google/devtools/build/lib/concurrent",
         "//src/main/java/com/google/devtools/build/lib/packages",
         "//src/main/java/com/google/devtools/build/lib/packages:build_type",
         "//src/main/java/com/google/devtools/build/lib/skyframe/serialization/autocodec",
-        "//src/main/java/com/google/devtools/build/lib/skylarkbuildapi",
-        "//src/main/java/com/google/devtools/build/lib/skylarkbuildapi/core",
-        "//src/main/java/com/google/devtools/build/lib/skylarkinterface",
         "//src/main/java/com/google/devtools/build/lib/vfs",
         "//src/main/java/com/google/devtools/build/lib/vfs:pathfragment",
-        "//src/main/java/com/google/devtools/build/skyframe:skyframe-objects",
         "//src/main/java/com/google/devtools/common/options",
-        "//src/main/protobuf:build_java_proto",
         "//third_party:auto_value",
         "//third_party:guava",
         "//third_party:jsr305",