remove all references to docker (#34811)

Co-authored-by: Scott Beddall (from Dev Box) <scbedd@microsoft.com>

eng/common/testproxy/onboarding/common-asset-functions.ps1

@@ -207,41 +207,6 @@ Function Invoke-ProxyCommand {
   )
   $updatedDirectory = $TargetDirectory.Replace("`\", "/")
 
-  # CommandString just a string indicating the proxy arguments. In the default case of running against the proxy tool, can just be used directly.
-  # However, in the case of docker, we need to append a bunch more arguments to the string.
-  if ($TestProxyExe -eq "docker" -or $TestProxyExe -eq "podman"){
-    $token = $env:GIT_TOKEN
-    $committer = $env:GIT_COMMIT_OWNER
-    $email = $env:GIT_COMMIT_EMAIL
-
-    if (-not $committer) {
-      $committer = & git config --global user.name
-    }
-
-    if (-not $email) {
-      $email = & git config --global user.email
-    }
-
-    if(-not $token -or -not $committer -or -not $email){
-      Write-Error ("When running this transition script in `"docker`" or `"podman`" mode, " `
-        + "the environment variables GIT_TOKEN, GIT_COMMIT_OWNER, and GIT_COMMIT_EMAIL must be set to reflect the appropriate user. ")
-        exit 1
-    }
-
-    $targetImage = if ($env:TRANSITION_SCRIPT_DOCKER_TAG) { $env:TRANSITION_SCRIPT_DOCKER_TAG } else { "azsdkengsys.azurecr.io/engsys/test-proxy:latest" }
-
-    $CommandString = @(
-      "run --rm --name transition.test.proxy",
-      "-v `"${updatedDirectory}:/srv/testproxy`"",
-      "-e `"GIT_TOKEN=${token}`"",
-      "-e `"GIT_COMMIT_OWNER=${committer}`"",
-      "-e `"GIT_COMMIT_EMAIL=${email}`"",
-      $targetImage,
-      "test-proxy",
-      $CommandString
-    ) -join " "
-  }
-
   Write-Host "$TestProxyExe $CommandString"
   [array] $output = & "$TestProxyExe" $CommandString.Split(" ") --storage-location="$updatedDirectory"
   # echo the command output

eng/common/testproxy/onboarding/generate-assets-json.ps1

@@ -22,9 +22,9 @@ Generated assets.json file contents
 If flag InitialPush is set, recordings will be automatically pushed to the assets repo and the Tag property updated.
 
 .PARAMETER TestProxyExe
-The executable used during the "InitialPush" action. Defaults to the dotnet tool test-proxy, but also supports "docker" or "podman".
+The executable used during the "InitialPush" action. Defaults to the dotnet tool test-proxy, but also supports custom executables as well.
 
-If the user provides their own value that doesn't match options "test-proxy", "docker", or "podman", the script will use this input as the test-proxy exe
+If the user provides their own value that doesn't match options "test-proxy" the script will use this input as the test-proxy exe
 when invoking commands. EG "$TestProxyExe push -a sdk/keyvault/azure-keyvault-keys/assets.json."
 
 .PARAMETER InitialPush