KAFKA-19822 Remove all unused static classes in Field (#20799)

Remove all unused static classes in `Field`.

Reviewers: Chia-Ping Tsai <[email protected]>

Author: DL1231

clients/src/main/java/org/apache/kafka/common/protocol/types/Field.java

@@ -46,115 +46,6 @@ public Field(String name, Type type) {
         this(name, type, null, false, null);
     }
 
-    public static class Int8 extends Field {
-        public Int8(String name, String docString) {
-            super(name, Type.INT8, docString, false, null);
-        }
-        public Int8(String name, String docString, byte defaultValue) {
-            super(name, Type.INT8, docString, true, defaultValue);
-        }
-    }
-
-    public static class Int32 extends Field {
-        public Int32(String name, String docString) {
-            super(name, Type.INT32, docString, false, null);
-        }
-
-        public Int32(String name, String docString, int defaultValue) {
-            super(name, Type.INT32, docString, true, defaultValue);
-        }
-    }
-
-    public static class Int64 extends Field {
-        public Int64(String name, String docString) {
-            super(name, Type.INT64, docString, false, null);
-        }
-
-        public Int64(String name, String docString, long defaultValue) {
-            super(name, Type.INT64, docString, true, defaultValue);
-        }
-    }
-
-    public static class UUID extends Field {
-        public UUID(String name, String docString) {
-            super(name, Type.UUID, docString, false, null);
-        }
-
-        public UUID(String name, String docString, UUID defaultValue) {
-            super(name, Type.UUID, docString, true, defaultValue);
-        }
-    }
-
-    public static class Int16 extends Field {
-        public Int16(String name, String docString) {
-            super(name, Type.INT16, docString, false, null);
-        }
-    }
-
-    public static class Uint16 extends Field {
-        public Uint16(String name, String docString) {
-            super(name, Type.UINT16, docString, false, null);
-        }
-    }
-
-    public static class Uint32 extends Field {
-        public Uint32(String name, String docString) {
-            super(name, Type.UNSIGNED_INT32, docString, false, null);
-        }
-    }
-
-    public static class Float64 extends Field {
-        public Float64(String name, String docString) {
-            super(name, Type.FLOAT64, docString, false, null);
-        }
-
-        public Float64(String name, String docString, double defaultValue) {
-            super(name, Type.FLOAT64, docString, true, defaultValue);
-        }
-    }
-
-    public static class Str extends Field {
-        public Str(String name, String docString) {
-            super(name, Type.STRING, docString, false, null);
-        }
-    }
-
-    public static class CompactStr extends Field {
-        public CompactStr(String name, String docString) {
-            super(name, Type.COMPACT_STRING, docString, false, null);
-        }
-    }
-
-    public static class NullableStr extends Field {
-        public NullableStr(String name, String docString) {
-            super(name, Type.NULLABLE_STRING, docString, false, null);
-        }
-    }
-
-    public static class CompactNullableStr extends Field {
-        public CompactNullableStr(String name, String docString) {
-            super(name, Type.COMPACT_NULLABLE_STRING, docString, false, null);
-        }
-    }
-
-    public static class Bool extends Field {
-        public Bool(String name, String docString) {
-            super(name, Type.BOOLEAN, docString, false, null);
-        }
-    }
-
-    public static class Array extends Field {
-        public Array(String name, Type elementType, String docString) {
-            super(name, new ArrayOf(elementType), docString, false, null);
-        }
-    }
-
-    public static class CompactArray extends Field {
-        public CompactArray(String name, Type elementType, String docString) {
-            super(name, new CompactArrayOf(elementType), docString, false, null);
-        }
-    }
-
     public static class TaggedFieldsSection extends Field {
         private static final String NAME = "_tagged_fields";
         private static final String DOC_STRING = "The tagged fields";
@@ -174,29 +65,4 @@ public TaggedFieldsSection(Type type) {
             super(NAME, type, DOC_STRING, false, null);
         }
     }
-
-    public static class ComplexArray {
-        public final String name;
-        public final String docString;
-
-        public ComplexArray(String name, String docString) {
-            this.name = name;
-            this.docString = docString;
-        }
-
-        public Field withFields(Field... fields) {
-            Schema elementType = new Schema(fields);
-            return new Field(name, new ArrayOf(elementType), docString, false, null);
-        }
-
-        public Field nullableWithFields(Field... fields) {
-            Schema elementType = new Schema(fields);
-            return new Field(name, ArrayOf.nullable(elementType), docString, false, null);
-        }
-
-        public Field withFields(String docStringOverride, Field... fields) {
-            Schema elementType = new Schema(fields);
-            return new Field(name, new ArrayOf(elementType), docStringOverride, false, null);
-        }
-    }
 }