Cleanup multiapi package generation (along with doc refs). (#41943)

* cleanup multiapi package generation (along with doc refs).

Author: scbedd

doc/dev/mgmt/cheatsheet.md

@@ -36,12 +36,6 @@ python ./scripts/dev_setup.py -p $PACKAGE
 python -m packaging_tools.generate_sdk -v -m restapi_path/readme.md
 ```
 
-Regenerate multi-api client:<br/>
-`python ./scripts/multiapi_init_gen.py azure-mgmt-myservice`
-
-Regenerate multi-api of multi-client package:<br/>
-`python ./scripts/multiapi_init_gen.py azure-mgmt-myservice#subclientname`
-
 ## Update packaging setup.py / MANIFEST / etc.
 
 Locally:<br/>
@@ -50,7 +44,7 @@ Locally:<br/>
 Update a given PR (needs GH_TOKEN env variable set):<br/>
 `python -m packaging_tools.update_pr -v -p 3979`
 
-Edit `sdk_packaging.toml` if necesseray and restart the tool.
+Edit `sdk_packaging.toml` if necessary and restart the tool.
 
 Available options:
 
@@ -61,7 +55,7 @@ Available options:
 | package_nspkg | str | namespace package name | azure-mgmt-nspkg |
 | package_pprint_name | str | The nice name to show on PyPI | MyService Management |
 | package_doc_id | str | the moniker on docs.microsoft.com (could be empty) | my-service |
-| is_stable | bool | Should have discriminer as stable | false |
+| is_stable | bool | Should have discriminator as stable | false |
 | is_arm | bool | needs a dependency on msrestazure | true |
 
 ## ChangeLog

doc/dev/package_version/package_version_rule.md

@@ -12,12 +12,10 @@ If Python SDK contains preview api-version (like "2020-01-01-preview"), its vers
 (1) For single-api package(for example: [confidentialledger](https://github.com/azure-sdk/azure-sdk-for-python/blob/a56c4b44911e173a89cb051aefc588e189e42654/sdk/confidentialledger/azure-mgmt-confidentialledger/azure/mgmt/confidentialledger/_configuration.py#L39)),
  as long as it contains preview api-version, the package version should be preview
 
-(2) For multi-api package(for example: [network](https://github.com/Azure/azure-sdk-for-python/tree/main/sdk/network/azure-mgmt-network)), 
-there will be `DEFAULT_API_VERSION`(for example: [`DEFAULT_API_VERSION` of network](https://github.com/Azure/azure-sdk-for-python/blob/0b3fb9ef0bee54f23beb7a4913faaaef5be90d9b/sdk/network/azure-mgmt-network/azure/mgmt/network/_network_management_client.py#L57)). 
+(2) For multi-api package(for example: [network](https://github.com/Azure/azure-sdk-for-python/tree/main/sdk/network/azure-mgmt-network)),
+there will be `DEFAULT_API_VERSION`(for example: [`DEFAULT_API_VERSION` of network](https://github.com/Azure/azure-sdk-for-python/blob/0b3fb9ef0bee54f23beb7a4913faaaef5be90d9b/sdk/network/azure-mgmt-network/azure/mgmt/network/_network_management_client.py#L57)).
 As long as it is preview, then the package version is preview.
 
-(note1: For more info about multi-api package, please refer to [multiapi.md](https://github.com/Azure/azure-sdk-for-python/blob/main/doc/dev/mgmt/multiapi.md))
-
 (note2: preview package version contains `b`, for example: `1.0.0b1`)
 
 # How to calculate next package version
@@ -40,4 +38,3 @@ According to the up rules, we could summarize all the possibilities in the follo
 ![img.png](version_summary.png)
 
 (`-` means that this item doesn't influence result)
-