Removing library loader, as it's not used.

src/xenia/cpu/backend.h

@@ -20,7 +20,6 @@ namespace cpu {
 
 
 class JIT;
-class LibraryLoader;
 
 namespace sdb {
 class SymbolTable;
@@ -31,8 +30,6 @@ class Backend {
 public:
   virtual ~Backend() {}
 
-  virtual LibraryLoader* CreateLibraryLoader() = 0;
-
   virtual JIT* CreateJIT(xe_memory_ref memory, sdb::SymbolTable* sym_table) = 0;
 
 protected: