fix: remove unresolvable xrefs from DocFX index

Author: Jani Giannoudis

docfx/index.md

@@ -1,31 +1,5 @@
 # Payroll Engine Script Reference
 
-## Case Functions
-- [Case Available](xref:PayrollEngine.Client.Scripting.Function.CaseAvailableFunction)
-- [Case Build](xref:PayrollEngine.Client.Scripting.Function.CaseBuildFunction)
-- [Case Validate](xref:PayrollEngine.Client.Scripting.Function.CaseValidateFunction)
-
-**Case Relation Functions**
-- [Case Relation Build](xref:PayrollEngine.Client.Scripting.Function.CaseRelationBuildFunction)
-- [Case Relation Validate](xref:PayrollEngine.Client.Scripting.Function.CaseRelationValidateFunction)
-
-
-## Payrun Functions
-- [Employee Available](xref:PayrollEngine.Client.Scripting.Function.PayrunEmployeeAvailableFunction)
-- [Wage Type Available](xref:PayrollEngine.Client.Scripting.Function.PayrunWageTypeAvailableFunction)
-
-**Collector Functions**
-- [Collector Start](xref:PayrollEngine.Client.Scripting.Function.CollectorStartFunction)
-- [Collector Apply](xref:PayrollEngine.Client.Scripting.Function.CollectorApplyFunction)
-- [Collector End](xref:PayrollEngine.Client.Scripting.Function.CollectorEndFunction)
-
-**Wage Type Functions**
-- [Wage Type Value](xref:PayrollEngine.Client.Scripting.Function.WageTypeValueFunction)
-- [Wage Type Result](xref:PayrollEngine.Client.Scripting.Function.WageTypeResultFunction)
-
-
-## Report Functions
-- [Report Build](xref:PayrollEngine.Client.Scripting.Function.ReportBuildFunction)
-- [Report Start](xref:PayrollEngine.Client.Scripting.Function.ReportStartFunction)
-- [Report End](xref:PayrollEngine.Client.Scripting.Function.ReportEndFunction)
+Browse the API reference using the navigation on the left.
 
+For conceptual documentation see [payrollengine.org](https://payrollengine.org).