Refactoring: makes the code simpler by deleting Metadata and InputArtifactData.

(minor) ActionFS now implements MetadataProvider.getInput

PiperOrigin-RevId: 199575194
diff --git a/src/main/java/com/google/devtools/build/lib/query2/SkyQueryEnvironment.java b/src/main/java/com/google/devtools/build/lib/query2/SkyQueryEnvironment.java
index 311171c..382a8d2 100644
--- a/src/main/java/com/google/devtools/build/lib/query2/SkyQueryEnvironment.java
+++ b/src/main/java/com/google/devtools/build/lib/query2/SkyQueryEnvironment.java
@@ -40,6 +40,7 @@
 import com.google.common.util.concurrent.ListeningExecutorService;
 import com.google.common.util.concurrent.MoreExecutors;
 import com.google.common.util.concurrent.ThreadFactoryBuilder;
+import com.google.devtools.build.lib.actions.FileStateValue;
 import com.google.devtools.build.lib.cmdline.Label;
 import com.google.devtools.build.lib.cmdline.PackageIdentifier;
 import com.google.devtools.build.lib.cmdline.TargetParsingException;
@@ -87,7 +88,6 @@
 import com.google.devtools.build.lib.query2.engine.VariableContext;
 import com.google.devtools.build.lib.skyframe.BlacklistedPackagePrefixesValue;
 import com.google.devtools.build.lib.skyframe.ContainingPackageLookupFunction;
-import com.google.devtools.build.lib.skyframe.FileStateValue;
 import com.google.devtools.build.lib.skyframe.GraphBackedRecursivePackageProvider;
 import com.google.devtools.build.lib.skyframe.PackageLookupValue;
 import com.google.devtools.build.lib.skyframe.PackageValue;