Updates based on feedback

Author: SamRemis

codegen/core/src/main/java/software/amazon/smithy/python/codegen/ClientGenerator.java

@@ -131,7 +131,6 @@ private void generateOperation(PythonWriter writer, OperationShape operation) {
         var outputSymbol = symbolProvider.toSymbol(output);
 
         writer.pushState(new OperationSection(service, operation));
-        writer.addStdlibImport("copy", "deepcopy");
         writer.putContext("input", inputSymbol);
         writer.putContext("output", outputSymbol);
         writer.putContext("plugin", pluginSymbol);
@@ -189,6 +188,7 @@ private void writeSharedOperationInit(PythonWriter writer, OperationShape operat
         writer.addImport("smithy_core.types", "TypedProperties");
         writer.addImport("smithy_core.aio.client", "RequestPipeline");
         writer.addImport("smithy_core.exceptions", "ExpectationNotMetError");
+        writer.addStdlibImport("copy", "deepcopy");
 
         writer.write("""
                 operation_plugins: list[Plugin] = [
@@ -221,7 +221,6 @@ raise ExpectationNotMetError("protocol and transport MUST be set on the config t
 
     private void generateEventStreamOperation(PythonWriter writer, OperationShape operation) {
         writer.pushState(new OperationSection(service, operation));
-        writer.addStdlibImport("copy", "deepcopy");
         writer.addDependency(SmithyPythonDependency.SMITHY_CORE);
         writer.addDependency(SmithyPythonDependency.SMITHY_AWS_CORE.withOptionalDependencies("eventstream"));
         var operationSymbol = symbolProvider.toSymbol(operation);