Remove unnecessary error in test

Author: estebank

src/test/ui/suggestions/let-binding-init-expr-as-ty.rs

@@ -1,9 +1,10 @@
-pub fn foo(num: i32) -> i32 { //~ ERROR mismatched types
+pub fn foo(num: i32) -> i32 {
     let foo: i32::from_be(num);
     //~^ ERROR expected type, found local variable `num`
     //~| ERROR parenthesized type parameters may only be used with a `Fn` trait
     //~| ERROR ambiguous associated type
     //~| WARNING this was previously accepted by the compiler but is being phased out
+    foo
 }
 
 fn main() {

src/test/ui/suggestions/let-binding-init-expr-as-ty.stderr

@@ -24,18 +24,7 @@ error[E0223]: ambiguous associated type
 LL |     let foo: i32::from_be(num);
    |              ^^^^^^^^^^^^^^^^^ help: use fully-qualified syntax: `<i32 as Trait>::from_be`
 
-error[E0308]: mismatched types
-  --> $DIR/let-binding-init-expr-as-ty.rs:1:25
-   |
-LL | pub fn foo(num: i32) -> i32 {
-   |        ---              ^^^ expected i32, found ()
-   |        |
-   |        implicitly returns `()` as its body has no tail or `return` expression
-   |
-   = note: expected type `i32`
-              found type `()`
-
-error: aborting due to 4 previous errors
+error: aborting due to 3 previous errors
 
-Some errors have detailed explanations: E0223, E0308, E0573.
+Some errors have detailed explanations: E0223, E0573.
 For more information about an error, try `rustc --explain E0223`.