Revert PR #1513 and #1522, closes #1564, closes #1656

Author: Rico Suter

src/NJsonSchema.CodeGeneration.CSharp.Tests/JsonIgnoreAttributesTests.cs

@@ -66,17 +66,6 @@ public PropertyModel(
                 (_property.ActualTypeSchema.IsDictionary && _settings.GenerateImmutableDictionaryProperties)
             )) == false;
 
-        /// <summary>Indicates whether or not this property has a <see cref="JsonIgnoreCondition"/>.</summary>
-        public bool HasJsonIgnoreCondition => JsonIgnoreCondition != null;
-
-        /// <summary>Returns the System.Text.Json.Serialization.JsonIgnoreCondition value to be applied to the property.</summary>
-        public string? JsonIgnoreCondition => _property switch
-        {
-            { IsRequired: false } => "System.Text.Json.Serialization.JsonIgnoreCondition.WhenWritingDefault",
-            { IsRequired: true } when _settings.RequiredPropertiesMustBeDefined => "System.Text.Json.Serialization.JsonIgnoreCondition.Never",
-            _ => null
-        };
-
         /// <summary>Gets the json property required.</summary>
         public string JsonPropertyRequiredCode
         {

src/NJsonSchema.CodeGeneration.CSharp/Models/PropertyModel.cs

@@ -53,9 +53,6 @@
 {%-   endif -%}
 {%- if UseSystemTextJson %}
     [System.Text.Json.Serialization.JsonPropertyName("{{ property.Name }}")]
-{%-   if property.HasJsonIgnoreCondition %}
-    [System.Text.Json.Serialization.JsonIgnore(Condition = {{ property.JsonIgnoreCondition }})]   
-{%-   endif -%}
 {%-   if property.IsStringEnumArray %}
     // TODO(system.text.json): Add string enum item converter
 {%-   endif -%}