Fix 2 occurrences of if-else-false-to-and

This `if` expression can be refactored to an equivalent expression using `and`.

Author: resyntax-ci[bot]

typed-racket-lib/typed-racket/env/global-env.rkt

@@ -75,9 +75,7 @@
 
 (define (maybe-finish-register-type id)
   (define v (free-id-table-ref the-mapping id))
-  (if (box? v)
-      (register-type id (unbox v))
-      #f))
+  (and (box? v) (register-type id (unbox v))))
 
 (define (unregister-type id)
   (free-id-table-remove! the-mapping id))

typed-racket-lib/typed-racket/env/init-envs.rkt

@@ -435,10 +435,9 @@
 
 (define (bound-in-this-module id)
   (define binding (identifier-binding id))
-  (if (and (list? binding) (module-path-index? (car binding)))
-      (let-values ([(mp base) (module-path-index-split (car binding))])
-        (not mp))
-      #f))
+  (and (and (list? binding) (module-path-index? (car binding)))
+       (let-values ([(mp base) (module-path-index-split (car binding))])
+         (not mp))))
 
 (define (make-init-code map f)
   (define (bound-f id v)