Remove superCallShouldBeFirst error

[sandersn]

It seems redundant since TS gives an error on any use of this before super, and non-this uses before super should be fine.

Fixes #37371

[sandersn]

#5833 (comment) from the original PR of the this error implies that it does make the blanket error redundant.

[rbuckton]

Wasn't this error due to how our transform for properties works? If you allow any non-this statement before super in a class with property initializers then we could have issues:

// ts
class D {
    constructor(f: number) { }
}

class C extends D {
  x = 1;
  constructor(f: boolean) {
   if (f) { super(1); } else { super(2); }
  }
}

// es2015
"use strict";
class D {
    constructor(f) { }
}
class C extends D {
    constructor(f) {
        this.x = 1; // oops?!
        if (f) {
            super(1);
        }
        else {
            super(2);
        }
    }
}

[rbuckton]

We would need to completely rewrite our class field emit transforms before we could remove this error.

[weswigham]

We can remove this error when target is esnext though, right?

[sandersn]

@weswigham esNext + useDefineForClassFields

[sandersn]

All right, the change now just removes the error for esnext+useDefineForClassFields.

[sandersn]

ping @weswigham @rbuckton to look at the reduced change.