Remove need to copy JSI arguments

Summary:
Since the generated functions move JSI arguments as rvalues into these methods, using const lvaue references doesn't provide any benefit, and in fact hinders our ability to *move* arguments somewhere else and instead requires having to confusingly copy them instead (which JSI makes more difficult).

Changelog:
Internal

Reviewed By: nlutsenko

Differential Revision: D34704455

fbshipit-source-id: 520a358d8a7adeb848e7d7eb204f7154f8f4b58d

packages/react-native-codegen/src/generators/modules/GenerateModuleH.js

@@ -152,12 +152,7 @@ module.exports = {
                     `Unsupported type for param "${param.name}" in ${prop.name}. Found: ${typeName}`,
                   resolveAlias,
                 );
-                const isObject = translatedParam.startsWith('jsi::');
-                return (
-                  (isObject
-                    ? 'const ' + translatedParam + ' &'
-                    : translatedParam + ' ') + param.name
-                );
+                return `${translatedParam} ${param.name}`;
               })
               .join(', ');
             return propertyTemplate