Enabled unity build on engine specific branch

Author: coderespawn

Source/ConstructionSystemEditor/ConstructionSystemEditor.Build.cs

@@ -6,7 +6,6 @@ public class ConstructionSystemEditor : ModuleRules
 	{
 		public ConstructionSystemEditor(ReadOnlyTargetRules Target) : base(Target)
         {
-            bUseUnity = false;
             PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;
             PublicIncludePaths.AddRange(
 				new string[] {

Source/ConstructionSystemRuntime/ConstructionSystemRuntime.Build.cs

@@ -6,7 +6,6 @@ public class ConstructionSystemRuntime : ModuleRules
 	{
 		public ConstructionSystemRuntime(ReadOnlyTargetRules Target) : base(Target)
         {
-            bUseUnity = false;
             PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;
             PublicIncludePaths.AddRange(
 				new string[] {

Source/PrefabricatorEditor/PrefabricatorEditor.Build.cs

@@ -6,7 +6,6 @@ public class PrefabricatorEditor : ModuleRules
 	{
 		public PrefabricatorEditor(ReadOnlyTargetRules Target) : base(Target)
         {
-            bUseUnity = false;
             PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;
             PublicIncludePaths.AddRange(
 				new string[] {

Source/PrefabricatorEditorPostInit/PrefabricatorEditorPostInit.Build.cs

@@ -6,7 +6,6 @@ public class PrefabricatorEditorPostInit : ModuleRules
 	{
 		public PrefabricatorEditorPostInit(ReadOnlyTargetRules Target) : base(Target)
         {
-            bUseUnity = false;
             PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;
             PublicIncludePaths.AddRange(
 				new string[] {

Source/PrefabricatorRuntime/PrefabricatorRuntime.Build.cs

@@ -6,7 +6,6 @@ public class PrefabricatorRuntime : ModuleRules
 	{
 		public PrefabricatorRuntime(ReadOnlyTargetRules Target) : base(Target)
         {
-            bUseUnity = false;
             PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;
             PublicIncludePaths.AddRange(
 				new string[] {