Remove redunant enum hash template specialization (#1442)

Signed-off-by: Daniel Kamkha <daniel.kamkha@here.com>

Author: DanielKamkha

gluecodium/src/main/resources/templates/cpp/CppImplementation.mustache

@@ -74,9 +74,6 @@ namespace {{.}} {
 {{#instanceOf this "LimeStruct"}}
 {{>cpp/StructHashImpl}}
 {{/instanceOf}}
-{{#instanceOf this "LimeEnumeration"}}
-{{>cpp/EnumHashImpl}}
-{{/instanceOf}}
 {{#instanceOf this "LimeClass"}}
 {{>cpp/ClassHashImpl}}
 {{/instanceOf}}