Some weeks ago, anonymous functions as expressions were added to
PascaLIGO, unfortunately in a manner that allowed in theory for
contexts in which a named function was found when an anonymous was
expected, and vice-versa. That explains that the simplifier had two new possible errors:
* unexpected_anonymous_function
("you provided a function declaration without name")
* unexpected_named_function
I changed the AST and the parser so that function expressions
correspond to anonymous functions (without block) and function
declarations correspond to named functions.
I also removed a error in the simplifier, which was unused:
* bad_bytes
("you provided a function expression with a name (remove it)")
