tools: Remove QueryApiCatalogCommand

This is only used in build.sh now, and we can replace that by using the find command.

Author: jskeet

build.sh

@@ -64,7 +64,7 @@ then
   # Build ReleaseManager first separately, so that we get any build messages
   # here rather than when we try to run it
   dotnet build tools/Google.Cloud.Tools.ReleaseManager
-  apis=(${tools} $(dotnet run --no-build --no-restore --project tools/Google.Cloud.Tools.ReleaseManager -- query-api-catalog list))
+  apis=(${tools} $(find apis -depth -mindepth 1 -maxdepth 1 -type d | sed 's#^apis/##'))
 fi
 
 # If we were given an API filter regex, apply it now.

tools/Google.Cloud.Tools.ReleaseManager/Program.cs

@@ -52,13 +52,6 @@ private static int Main(string[] args)
 
         private static ICommand GetCommand(string[] args)
         {
-            // This is called a lot during local generation, and doesn't do much. The reflection required
-            // to instantiate all the commands is significant, so we bypass it when we can.
-            if (args.Length >= 1 && args[0] == QueryApiCatalogCommand.CommandName)
-            {
-                return new QueryApiCatalogCommand();
-            }
-
             var allCommands = typeof(Program).Assembly.GetTypes()
                 .Where(t => !t.IsAbstract && typeof(ICommand).IsAssignableFrom(t))
                 .Select(Activator.CreateInstance)