Un-xfail working tests

Author: catamorphism

src/test/compile-fail/borrowck-loan-rcvr-overloaded-op.rs

@@ -1,8 +1,3 @@
-// xfail-test
-// xfail-fast
-
-// XFAIL'd because of error message problems with demoded Add.
-
 struct Point { 
     x: int,
     y: int,

src/test/compile-fail/dead-code-ret.rs

@@ -1,4 +1,3 @@
-// xfail-test
 // -*- rust -*-
 
 // error-pattern: dead

src/test/compile-fail/ext-noname.rs

@@ -1,4 +1,3 @@
-// xfail-test
 // error-pattern:expected a syntax expander name
 
 fn main() {