[java compiler] API cleanup: mark Compiler.validateConfiguration as deprecated and remove implementations

This is needed to avoid confusion since the method isn't called by the compilation engine anymore.

GitOrigin-RevId: ad95b74748623596cef8dd5a094a2b99c99c3c6e

java/compiler/impl/src/com/intellij/openapi/compiler/util/InspectionValidatorWrapper.java

@@ -367,11 +367,6 @@ public final class InspectionValidatorWrapper implements Validator {
     return myValidator.getDescription();
   }
 
-  @Override
-  public boolean validateConfiguration(CompileScope scope) {
-    return true;
-  }
-
   @Override
   public ValidityState createValidityState(DataInput in) throws IOException {
     return PsiElementsValidityState.load(in);

java/compiler/openapi/src/com/intellij/openapi/compiler/Compiler.java

@@ -27,10 +27,11 @@ public interface Compiler {
   String getDescription();
 
   /**
-   * Called before compilation starts. If at least one of registered compilers returned false, compilation won't start.
-   *
-   * @param scope the scope on which the compilation is started.
-   * @return true if everything is ok, false otherwise
+   * @deprecated isn't called by the compilation engine anymore; if the configuration of a specific compiled is invalid, it should report an 
+   * error via {@link CompileContext#addMessage}.
    */
-  boolean validateConfiguration(CompileScope scope);
+  @Deprecated(forRemoval = true)
+  default boolean validateConfiguration(CompileScope scope) {
+    return true;
+  }
 }

plugins/ui-designer/src/com/intellij/uiDesigner/make/Form2SourceCompiler.java

@@ -57,11 +57,6 @@ public final class Form2SourceCompiler implements SourceInstrumentingCompiler{
     return UIDesignerBundle.message("component.gui.designer.form.to.source.compiler");
   }
 
-  @Override
-  public boolean validateConfiguration(CompileScope scope) {
-    return true;
-  }
-
   @Override
   public ProcessingItem @NotNull [] getProcessingItems(final @NotNull CompileContext context) {
     final Project project = context.getProject();