Remove stale references to coordinator dynamic config killAllDataSources. (#16387)

This parameter has been removed for awhile now as of Druid 0.23.0
https://github.com/apache/druid/pull/12187.

The code was only used in tests to verify that serialization works.
Now remove all references to avoid any confusion.

server/src/main/java/org/apache/druid/server/coordinator/CoordinatorDynamicConfig.java

@@ -266,12 +266,6 @@ public class CoordinatorDynamicConfig
     return maxKillTaskSlots;
   }
 
-  @JsonIgnore
-  public boolean isKillUnusedSegmentsInAllDataSources()
-  {
-    return specificDataSourcesToKillUnusedSegmentsIn.isEmpty();
-  }
-
   @JsonProperty("killPendingSegmentsSkipList")
   public Set<String> getDataSourcesToNotKillStalePendingSegmentsIn()
   {

server/src/test/java/org/apache/druid/server/http/CoordinatorDynamicConfigTest.java

@@ -263,7 +263,6 @@ public class CoordinatorDynamicConfigTest
         false,
         null
     );
-    Assert.assertTrue(config.isKillUnusedSegmentsInAllDataSources());
     Assert.assertTrue(config.getSpecificDataSourcesToKillUnusedSegmentsIn().isEmpty());
   }
 
@@ -290,7 +289,6 @@ public class CoordinatorDynamicConfigTest
         false,
         null
     );
-    Assert.assertFalse(config.isKillUnusedSegmentsInAllDataSources());
     Assert.assertEquals(ImmutableSet.of("test1"), config.getSpecificDataSourcesToKillUnusedSegmentsIn());
   }
 
@@ -468,60 +466,6 @@ public class CoordinatorDynamicConfigTest
     );
   }
 
-  @Test
-  public void testSerdeWithKillAllDataSources() throws Exception
-  {
-    String jsonStr = "{\n"
-                     + "  \"millisToWaitBeforeDeleting\": 1,\n"
-                     + "  \"mergeBytesLimit\": 1,\n"
-                     + "  \"mergeSegmentsLimit\" : 1,\n"
-                     + "  \"maxSegmentsToMove\": 1,\n"
-                     + "  \"replicantLifetime\": 1,\n"
-                     + "  \"replicationThrottleLimit\": 1,\n"
-                     + "  \"balancerComputeThreads\": 2, \n"
-                     + "  \"killAllDataSources\": true,\n"
-                     + "  \"maxSegmentsInNodeLoadingQueue\": 1\n"
-                     + "}\n";
-
-    CoordinatorDynamicConfig actual = mapper.readValue(
-        mapper.writeValueAsString(
-            mapper.readValue(jsonStr, CoordinatorDynamicConfig.class)
-        ),
-        CoordinatorDynamicConfig.class
-    );
-
-    assertConfig(
-        actual,
-        1,
-        1,
-        1,
-        1,
-        1,
-        1,
-        2,
-        ImmutableSet.of(),
-        0.1,
-        Integer.MAX_VALUE,
-        true,
-        1,
-        ImmutableSet.of(),
-        false,
-        false
-    );
-
-    // killAllDataSources is a config in versions 0.22.x and older and is no longer used.
-    // This used to be an invalid config, but as of 0.23.0 the killAllDataSources flag no longer exsist,
-    // so this is a valid config
-    jsonStr = "{\n"
-              + "  \"killDataSourceWhitelist\": [\"test1\",\"test2\"],\n"
-              + "  \"killAllDataSources\": true\n"
-              + "}\n";
-    actual = mapper.readValue(jsonStr, CoordinatorDynamicConfig.class);
-
-    Assert.assertFalse(actual.isKillUnusedSegmentsInAllDataSources());
-    Assert.assertEquals(2, actual.getSpecificDataSourcesToKillUnusedSegmentsIn().size());
-  }
-
   @Test
   public void testDeserializeWithoutMaxSegmentsInNodeLoadingQueue() throws Exception
   {
@@ -532,8 +476,7 @@ public class CoordinatorDynamicConfigTest
                      + "  \"maxSegmentsToMove\": 1,\n"
                      + "  \"replicantLifetime\": 1,\n"
                      + "  \"replicationThrottleLimit\": 1,\n"
-                     + "  \"balancerComputeThreads\": 2, \n"
-                     + "  \"killAllDataSources\": true\n"
+                     + "  \"balancerComputeThreads\": 2\n"
                      + "}\n";
 
     CoordinatorDynamicConfig actual = mapper.readValue(
@@ -691,7 +634,6 @@ public class CoordinatorDynamicConfigTest
         expectedSpecificDataSourcesToKillUnusedSegmentsIn,
         config.getSpecificDataSourcesToKillUnusedSegmentsIn()
     );
-    Assert.assertEquals(expectedKillUnusedSegmentsInAllDataSources, config.isKillUnusedSegmentsInAllDataSources());
     Assert.assertEquals(expectedKillTaskSlotRatio, config.getKillTaskSlotRatio(), 0.001);
     Assert.assertEquals((int) expectedMaxKillTaskSlots, config.getMaxKillTaskSlots());
     Assert.assertEquals(expectedMaxSegmentsInNodeLoadingQueue, config.getMaxSegmentsInNodeLoadingQueue());

web-console/src/druid-models/coordinator-dynamic-config/coordinator-dynamic-config.tsx

@@ -26,7 +26,6 @@ import { getLink } from '../../links';
 export interface CoordinatorDynamicConfig {
   maxSegmentsToMove?: number;
   balancerComputeThreads?: number;
-  killAllDataSources?: boolean;
   killDataSourceWhitelist?: string[];
   killTaskSlotRatio?: number;
   maxKillTaskSlots?: number;