Don't expose as knob.

Reactivate #1637

Author: MikeStall

src/WebJobs.Script/Config/ScriptHostConfiguration.cs

@@ -105,13 +105,6 @@ public ScriptHostConfiguration()
         /// </summary>
         public bool IsSelfHost { get; set; }
 
-        /// <summary>
-        /// Gets or sets a value indicating whether we can lazy load the extensions.
-        /// If true, only load extensions that are explicitly referenced from function.json or method signatures.
-        /// Default to false
-        /// </summary>
-        public bool LazyLoadExtensions { get; set; }
-
         /// <summary>
         /// Gets or sets the <see cref="LogCategoryFilter"/> to use when constructing providers for the
         /// registered <see cref="ILoggerFactory"/>.

src/WebJobs.Script/Host/ScriptHost.cs

@@ -470,7 +470,8 @@ protected virtual void Initialize()
                 var functionMetadata = ReadFunctionMetadata(ScriptConfig, TraceWriter, _startupLogger, FunctionErrors, _settingsManager);
                 var usedBindingTypes = DiscoverBindingTypes(functionMetadata);
 
-                if (!ScriptConfig.LazyLoadExtensions)
+                bool useLazyLoad = false; // todo - https://github.com/Azure/azure-webjobs-sdk-script/issues/1637
+                if (!useLazyLoad)
                 {
                     usedBindingTypes = _builtinBindingTypes.Keys.Concat(_builtinScriptBindingTypes.Keys).ToArray();
                 }
@@ -1488,14 +1489,6 @@ internal static void ApplyConfiguration(JObject config, ScriptHostConfiguration
                 }
             }
 
-            if (config.TryGetValue("lazyLoadExtensions", out value))
-            {
-                if (value.Type == JTokenType.Boolean)
-                {
-                    scriptConfig.LazyLoadExtensions = (bool)value;
-                }
-            }
-
             if (config.TryGetValue("functionTimeout", out value))
             {
                 TimeSpan requestedTimeout = TimeSpan.Parse((string)value, CultureInfo.InvariantCulture);