CSlideShow: Collapse loop into std::all_of

Same behavior, less code. We can also make this function fully
internally linked, given it doesn't depend on instance state.

Runtime/MP1/CSlideShow.cpp

@@ -1,10 +1,16 @@
 #include "Runtime/MP1/CSlideShow.hpp"
 
-#include "Editor/ProjectManager.hpp"
+#include <algorithm>
 
+#include "Editor/ProjectManager.hpp"
 #include "Runtime/GameGlobalObjects.hpp"
 
 namespace urde {
+namespace {
+bool AreAllDepsLoaded(const std::vector<TLockedToken<CDependencyGroup>>& deps) {
+  return std::all_of(deps.cbegin(), deps.cend(), [](const auto& dep) { return dep.IsLoaded(); });
+}
+} // Anonymous namespace
 
 CSlideShow::CSlideShow() : CIOWin("SlideShow"), x130_(g_tweakSlideShow->GetX54()) {
   const SObjectTag* font = g_ResFactory->GetResourceIdByName(g_tweakSlideShow->GetFont());
@@ -58,14 +64,6 @@ bool CSlideShow::LoadTXTRDep(std::string_view name) {
   return false;
 }
 
-bool CSlideShow::AreAllDepsLoaded(const std::vector<TLockedToken<CDependencyGroup>>& deps) {
-  for (const TLockedToken<CDependencyGroup>& token : deps) {
-    if (!token.IsLoaded())
-      return false;
-  }
-  return true;
-}
-
 CIOWin::EMessageReturn CSlideShow::OnMessage(const CArchitectureMessage& msg, CArchitectureQueue& queue) {
   switch (msg.GetType()) {
   case EArchMsgType::TimerTick: {

Runtime/MP1/CSlideShow.hpp

@@ -98,7 +98,6 @@ private:
   bool x135_24_ : 1 = true;
 
   bool LoadTXTRDep(std::string_view name);
-  static bool AreAllDepsLoaded(const std::vector<TLockedToken<CDependencyGroup>>& deps);
 
 public:
   CSlideShow();