Ranged cache invalidation

* Fix clearing code block on a partial invalidation
* Remove unnecessary use of boost::variant
* Code cleanup

src/common/address_range.h

@@ -6,20 +6,14 @@
 
 #pragma once
 
-#include <cstddef>
-
-#include <boost/variant.hpp>
-
 #include "common/common_types.h"
 
 namespace Dynarmic {
 namespace Common {
 
-struct FullAddressRange {};
-
-struct AddressInterval {
+struct AddressRange {
     u32 start_address;
-    std::size_t length;
+    size_t length;
 
     // Does this interval overlap with [from, to)?
     bool Overlaps(u32 from, u32 to) const {
@@ -27,7 +21,5 @@ struct AddressInterval {
     }
 };
 
-using AddressRange = boost::variant<FullAddressRange, AddressInterval>;
-
 } // namespace Common
 } // namespace Dynarmic