Remove Devise validatable
Remove Devise validatable

+ Since we're importing educators in bulk from X2 without email or password, we don't want to validate on email and password
+ Somerville's LDAP is going to handle the username and password validation :0)

studentinsights/studentinsights,studentinsights/studentinsights,erose/studentinsights,jhilde/studentinsights,erose/studentinsights,codeforamerica/somerville-teacher-tool,jhilde/studentinsights,codeforamerica/somerville-teacher-tool,erose/studentinsights,jhilde/studentinsights,studentinsights/studentinsights,jhilde/studentinsights,erose/studentinsights,studentinsights/studentinsights,codeforamerica/somerville-teacher-tool,codeforamerica/somerville-teacher-tool