Kapt: remove old JVM backend test data (1/2)

In this commit, .txt expectation test data files for the old JVM backend
are deleted.

 #KT-64680

plugins/kapt3/kapt3-compiler/testData/converter/invalidFieldName.txt

@@ -1,46 +0,0 @@
-@Anno(color = Color.InvalidFieldName)
-@java.lang.annotation.Retention(value = java.lang.annotation.RetentionPolicy.RUNTIME)
-/**
- * public final annotation class Anno : kotlin/Annotation {
- *
- *   // signature: <init>(LColor;)V
- *   public constructor(color: Color)
- *
- *   // getter: color()LColor;
- *   public final val color: Color
- *     public final get
- *
- *   // module name: main
- * }
- */
-@kotlin.Metadata()
-public abstract @interface Anno {
-
-    public abstract Color color();
-}
-
-////////////////////
-
-
-/**
- * public final enum class Color : kotlin/Enum<Color> {
- *
- *   // signature: <init>(Ljava/lang/String;I)V
- *   private constructor()
- *
- *   BLACK,
- *
- *   WHI-TE,
- *
- *   // module name: main
- *
- *   // has Enum.entries
- * }
- */
-@kotlin.Metadata()
-public enum Color {
-    /*public static final*/ BLACK /* = new Color() */;
-
-    Color() {
-    }
-}