* [haskell][haskell-yesod] remove fixOperatorChars()
fixOperatorChars() does not change input strings since special
characters have already been replaced in DefaultCodegen.fromModel().
* [haskell][haskell-yesod] do not prefix with quote ("'") when generating removeFieldLabelPrefix table
We switched from the conversion done by fixOperatorChars() to the
conversion done by DefaultCodegen.fromModel() and the latter does not
insert quote characters. So We modify the removeFieldLabelPrefix table
to conform the new mapping.
* [haskell][haskell-yesod] remove forParsing parameter from removeFieldLabelPrefix function
Aeson's fieldLabelModifier always convert Haskell field names to JSON
field names, whether at parse time or not. (Note that stripPrefix and
uncapitalize do not take such parameter)
* [haskell][haskell-yesod] perform replaceSpecialChars after stripping prefix
Because replaceSpecialChars can corrupt prefix if the prefix contains
a replacement string of a specfial character as a substring.
* [haskell][haskell-yesod] regenerate samples