Delete the obsolete flag --distinct_host_configuration.

Fixes bazelbuild#17731.

RELNOTES: The flag `--distinct_host_configuration` is removed. It has been a no-op since Bazel 6.0.0.
PiperOrigin-RevId: 518366987
Change-Id: I6fff03380586cc771151ba4252eba7afba12323e

src/main/java/com/google/devtools/build/lib/bazel/rules/BazelRulesModule.java

@@ -448,15 +448,6 @@ public static final class AllCommandGraveyardOptions extends OptionsBase {
         help = "No-op")
     public boolean besBestEffort;
 
-    @Option(
-        name = "distinct_host_configuration",
-        defaultValue = "false",
-        documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
-        effectTags = {OptionEffectTag.NO_OP},
-        metadataTags = {OptionMetadataTag.INCOMPATIBLE_CHANGE},
-        help = "No-op.")
-    public boolean useDistinctHostConfiguration;
-
     @Option(
         name = "experimental_keep_config_nodes_on_analysis_discard",
         defaultValue = "false",