Don't include location in a message about binding function to a type

test/libsolidity/syntaxTests/using/free_functions_implicit_conversion_err.sol

@@ -11,4 +11,4 @@ contract C {
 }
 // ----
 // TypeError 3100: (112-114): The function "id" cannot be bound to the type "uint256" because the type cannot be implicitly converted to the first argument of the function ("uint16").
-// TypeError 3100: (140-142): The function "id" cannot be bound to the type "struct S storage pointer" because the type cannot be implicitly converted to the first argument of the function ("uint16").
+// TypeError 3100: (140-142): The function "id" cannot be bound to the type "struct S" because the type cannot be implicitly converted to the first argument of the function ("uint16").

test/libsolidity/syntaxTests/using/using_free_no_parameters_struct_err.sol

@@ -0,0 +1,5 @@
+struct S { uint8 x; }
+function f() {}
+using {f} for S;
+// ----
+// TypeError 4731: (45-46): The function "f" does not have any parameters, and therefore cannot be bound to the type "struct S".