Expr methods are confusing

[japgolly]

final def compile2      [A,B](mkExpr: (String,String) => String): CompileDsl2[A,B] =
final def compileExpr2  [A,B](mkExpr: (String,String) => String)(implicit lang: Language,   final def apply2[A,B](mkExpr: (String,String) => String, a: A, b: B)(implicit lang: Language, A:ExprParam[A], B:ExprParam[B]): Expr[Value] =
final def compileFnCall2[A,B](fnName: String): CompileDsl2[A,B] =
final def callFn2       [A,B](fnName: String, a: A, b: B)(implicit lang: Language, A:ExprParam[A], B:ExprParam[B]): Expr[Value] =

I long ago thought that helpers in different shapes would be useful but really it's just confusing. The mental cost of figuring out which method to call is greater than any effort saved specifying a single type param (or whatever). Simplify and be consistent!

[japgolly]

Closed via 67f84b1 / 5d2f530 / 5aece45