feat(concerto): remove concerto docs (#420)

Signed-off-by: Matt Roberts <code@rbrts.uk>

Signed-off-by: Matt Roberts <code@rbrts.uk>

Author: mttrbrts

docs/accordproject-slc.md

@@ -39,7 +39,7 @@ To make sense of the data, a _Data Model_, expressed in the Concerto schema lang
   o Double monthlyPayment // monthlyPayment is a floating-point number
 ```
 
-The Data Types allow a computer to validate values inserted into each of the `{{variable}}` placeholders (e.g., `2.5` is a valid `{{rate}}` but `January` isn't). In other words, the Data Model lets a computer make sense of the structure of (and data in) the clause. To learn more about Data Types see [Concerto Modeling](model-concerto.md).
+The Data Types allow a computer to validate values inserted into each of the `{{variable}}` placeholders (e.g., `2.5` is a valid `{{rate}}` but `January` isn't). In other words, the Data Model lets a computer make sense of the structure of (and data in) the clause. To learn more about Data Types see [Concerto Modeling](https://concerto.accordproject.org/docs/intro).
 
 The clause data (the 'deal points') can then be capture as a machine-readable representation:
 

docs/accordproject-template.md

@@ -120,7 +120,7 @@ Thanks to that model, the computer knows that the `shipper` variable (`"Party A"
 
 Concerto is the language which is used to write models in Accord Project templates. Concerto offers modern modeling capabilities including support for primitive types (numbers, dates, etc), nested or optional data structures, enumerations, relationships, object-oriented style inheritance, and more.
 
-_More information about Concerto can be found in the [Concerto Model](model-concerto.md) section of this documentation._
+_More information about Concerto can be found in the [Concerto Model](https://concerto.accordproject.org/docs/intro) section of this documentation._
 
 ## Template Logic
 

docs/accordproject.md

@@ -51,7 +51,7 @@ To start using Accord Project templates, follow the [Install Cicero](https://doc
 
 You can find in-depth guides for the different components of a template in the _Template Guides_ part of the documentation:
 - Learn how to write contract or template text in the [Markdown Text](markup-preliminaries.md) Guide
-- Learn how to design your data model in the [Concerto Model](model-concerto.md) Guide
+- Learn how to design your data model in the [Concerto Model](https://concerto.accordproject.org/docs/intro) Guide
 - Learn how to write smart contract logic in the [Ergo Logic](logic-ergo.md) Guide
 
 Finally, the documentation includes several step by step [Tutorials](tutorial-templates.md) and some reference information (for APIs, command-line tools, etc.) can be found in the [Reference Manual](ref-glossary.md).

docs/logic-complex-type.md

@@ -3,7 +3,7 @@ id: logic-complex-type
 title: Complex Values & Types
 ---
 
-So far we only considered atomic values and types, such as string values or integers, which are not sufficient for most contracts. In Ergo, values and types are based on the [Concerto Modeling](model-concerto.md) (often referred to as CTO models after the `.cto` file extension). This provides a rich vocabulary to define the parameters of your contract, the information associated to contract participants, the structure of contract obligation, etc.
+So far we only considered atomic values and types, such as string values or integers, which are not sufficient for most contracts. In Ergo, values and types are based on the [Concerto Modeling](https://concerto.accordproject.org/docs/intro) (often referred to as CTO models after the `.cto` file extension). This provides a rich vocabulary to define the parameters of your contract, the information associated to contract participants, the structure of contract obligation, etc.
 
 In Ergo, you can either import an existing CTO model or declare types directly within your code. Let us look at the different kinds of types you can define and how to create values with those types.
 

docs/logic-simple-type.md

@@ -13,7 +13,7 @@ the comments mention that `"John Smith"` is of type `String`, and that `1` is of
 
 In reality, the Ergo compiler understands which types your expressions have and can detect whether those expressions apply to the right type(s) or not.
 
-Ergo types are based on the [Concerto Modeling](model-concerto.md) Language.
+Ergo types are based on the [Concerto Modeling](https://concerto.accordproject.org/docs/intro) Language.
 
 ## Primitive types
 

docs/markup-templatemark.md

@@ -5,7 +5,7 @@ title: TemplateMark
 
 TemplateMark is an extension to CommonMark used to write the text in Accord Project templates. The extension includes new markdown for variables, inline and container elements of the markdown and template formulas.
 
-The kind of extension which can be used is based on the _type_ of the variable in the [Concerto Model](model-concerto.md) for your template. For each type in your model differrent markdown elements apply: variable markdown for atomic types in the model, list blocks for array types in the model, optional blocks for optional types in the model, etc.
+The kind of extension which can be used is based on the _type_ of the variable in the [Concerto Model](https://concerto.accordproject.org/docs/intro) for your template. For each type in your model differrent markdown elements apply: variable markdown for atomic types in the model, list blocks for array types in the model, optional blocks for optional types in the model, etc.
 
 ## Variables