kernel/handle_table: Move private static functions into the cpp file

These don't depend on class state, and are effectively implementation
details, so they can go into the cpp file .

src/core/hle/kernel/handle_table.cpp

@@ -11,6 +11,15 @@
 #include "core/hle/kernel/thread.h"
 
 namespace Kernel {
+namespace {
+constexpr u16 GetSlot(Handle handle) {
+    return handle >> 15;
+}
+
+constexpr u16 GetGeneration(Handle handle) {
+    return handle & 0x7FFF;
+}
+} // Anonymous namespace
 
 HandleTable::HandleTable(KernelSystem& kernel) : kernel(kernel) {
     next_generation = 1;

src/core/hle/kernel/handle_table.h

@@ -96,13 +96,6 @@ private:
      */
     static const std::size_t MAX_COUNT = 4096;
 
-    static u16 GetSlot(Handle handle) {
-        return handle >> 15;
-    }
-    static u16 GetGeneration(Handle handle) {
-        return handle & 0x7FFF;
-    }
-
     /// Stores the Object referenced by the handle or null if the slot is empty.
     std::array<SharedPtr<Object>, MAX_COUNT> objects;