Simplify simple.smithy (#2339)

`simple.smithy` is currently not that simple. Besides, it serves no
effective purpose: everything that the model exercises is already
exercised in a clearer and more orderly manner in other integration
tests.

This PR makes the model minimal, so that it recovers its purpose as a
simple smoke test. Contributors can also use the model as a scratchpad
for features or bugfixs they're working on.

codegen-core/common-test-models/simple.smithy

@@ -1,136 +1,22 @@
-$version: "1.0"
+$version: "2.0"
 
 namespace com.amazonaws.simple
 
 use aws.protocols#restJson1
-use smithy.test#httpRequestTests
-use smithy.test#httpResponseTests
-use smithy.framework#ValidationException
 
 @restJson1
-@title("SimpleService")
-@documentation("A simple service example, with a Service resource that can be registered and a readonly healthcheck")
 service SimpleService {
-    version: "2022-01-01",
-    resources: [
-        Service,
-    ],
     operations: [
-        Healthcheck,
-        StoreServiceBlob,
-    ],
+        Operation
+    ]
 }
 
-@documentation("Id of the service that will be registered")
-string ServiceId
-
-@documentation("Name of the service that will be registered")
-string ServiceName
-
-@error("client")
-@documentation(
-    """
-    Returned when a new resource cannot be created because one already exists.
-    """
-)
-structure ResourceAlreadyExists {
-    @required
-    message: String
-}
-
-@documentation("A resource that can register services")
-resource Service {
-    identifiers: { id: ServiceId },
-    put: RegisterService,
-}
-
-@idempotent
-@http(method: "PUT", uri: "/service/{id}")
-@documentation("Service register operation")
-@httpRequestTests([
-    {
-        id: "RegisterServiceRequestTest",
-        protocol: "aws.protocols#restJson1",
-        uri: "/service/1",
-        headers: {
-            "Content-Type": "application/json",
-        },
-        params: { id: "1", name: "TestService" },
-        body: "{\"name\":\"TestService\"}",
-        method: "PUT",
-    }
-])
-@httpResponseTests([
-    {
-        id: "RegisterServiceResponseTest",
-        protocol: "aws.protocols#restJson1",
-        params: { id: "1", name: "TestService" },
-        body: "{\"id\":\"1\",\"name\":\"TestService\"}",
-        code: 200,
-        headers: {
-            "Content-Length": "31"
-        }
-    }
-])
-operation RegisterService {
-    input: RegisterServiceInputRequest,
-    output: RegisterServiceOutputResponse,
-    errors: [ResourceAlreadyExists, ValidationException]
-}
-
-@documentation("Service register input structure")
-structure RegisterServiceInputRequest {
-    @required
-    @httpLabel
-    id: ServiceId,
-    name: ServiceName,
-}
-
-@documentation("Service register output structure")
-structure RegisterServiceOutputResponse {
-    @required
-    id: ServiceId,
-    name: ServiceName,
-}
-
-@readonly
-@http(uri: "/healthcheck", method: "GET")
-@documentation("Read-only healthcheck operation")
-operation Healthcheck {
-    input: HealthcheckInputRequest,
-    output: HealthcheckOutputResponse
+@http(uri: "/operation", method: "POST")
+operation Operation {
+    input: OperationInputOutput
+    output: OperationInputOutput
 }
 
-@documentation("Service healthcheck output structure")
-structure HealthcheckInputRequest {
-
-}
-
-@documentation("Service healthcheck input structure")
-structure HealthcheckOutputResponse {
-
-}
-
-@readonly
-@http(method: "POST", uri: "/service/{id}/blob")
-@documentation("Stores a blob for a service id")
-operation StoreServiceBlob {
-    input: StoreServiceBlobInput,
-    output: StoreServiceBlobOutput,
-    errors: [ValidationException]
-}
-
-@documentation("Store a blob for a service id input structure")
-structure StoreServiceBlobInput {
-    @required
-    @httpLabel
-    id: ServiceId,
-    @required
-    @httpPayload
-    content: Blob,
-}
-
-@documentation("Store a blob for a service id output structure")
-structure StoreServiceBlobOutput {
-
+structure OperationInputOutput {
+    message: String
 }