removed deprecated min/max/minlength/maxlength constraints

Author: fabpot

reference/constraints.rst

@@ -14,15 +14,11 @@ Validation Constraints Reference
    constraints/Type
 
    constraints/Email
-   constraints/MinLength
-   constraints/MaxLength
    constraints/Length
    constraints/Url
    constraints/Regex
    constraints/Ip
 
-   constraints/Max
-   constraints/Min
    constraints/Range
 
    constraints/Date