Remove the `SearchType` setter on `SearchContext`. #17955

It was not used.

core/src/main/java/org/elasticsearch/search/internal/DefaultSearchContext.java

@@ -309,12 +309,6 @@ public class DefaultSearchContext extends SearchContext {
         return this.searchType;
     }
 
-    @Override
-    public SearchContext searchType(SearchType searchType) {
-        this.searchType = searchType;
-        return this;
-    }
-
     @Override
     public SearchShardTarget shardTarget() {
         return this.shardTarget;

core/src/main/java/org/elasticsearch/search/internal/FilteredSearchContext.java

@@ -105,11 +105,6 @@ public abstract class FilteredSearchContext extends SearchContext {
         return in.searchType();
     }
 
-    @Override
-    public SearchContext searchType(SearchType searchType) {
-        return in.searchType(searchType);
-    }
-
     @Override
     public SearchShardTarget shardTarget() {
         return in.shardTarget();

core/src/main/java/org/elasticsearch/search/internal/SearchContext.java

@@ -129,8 +129,6 @@ public abstract class SearchContext implements Releasable {
 
     public abstract SearchType searchType();
 
-    public abstract SearchContext searchType(SearchType searchType);
-
     public abstract SearchShardTarget shardTarget();
 
     public abstract int numberOfShards();

core/src/main/java/org/elasticsearch/search/internal/SubSearchContext.java

@@ -87,11 +87,6 @@ public class SubSearchContext extends FilteredSearchContext {
         throw new UnsupportedOperationException("this context should be read only");
     }
 
-    @Override
-    public SearchContext searchType(SearchType searchType) {
-        throw new UnsupportedOperationException("this context should be read only");
-    }
-
     @Override
     public SearchContext queryBoost(float queryBoost) {
         throw new UnsupportedOperationException("Not supported");

test/framework/src/main/java/org/elasticsearch/test/TestSearchContext.java

@@ -157,11 +157,6 @@ public class TestSearchContext extends SearchContext {
         return null;
     }
 
-    @Override
-    public SearchContext searchType(SearchType searchType) {
-        return null;
-    }
-
     @Override
     public SearchShardTarget shardTarget() {
         return null;