[MERGE #3704 @pleath] [MSFT 13639200] Remove byte code serializer assert that a string template callsite constant cannot be a PropertyString.
[MERGE #3704 @pleath] [MSFT 13639200] Remove byte code serializer assert that a string template callsite constant cannot be a PropertyString.

Merge pull request #3704 from pleath:13639200

The condition is harmless and turns out to be a normal case for single-character strings.

Microsoft/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore