Remove more redundant `devilutionx.mpq` checks

Source/controls/modifier_hints.cpp

@@ -172,15 +172,9 @@ void DrawSelectModifierMenu(const Surface &out)
 
 void InitModifierHints()
 {
-	hintBox = LoadOptionalClx("data\\hintbox.clx");
-	hintBoxBackground = LoadOptionalClx("data\\hintboxbackground.clx");
-	hintIcons = LoadOptionalClx("data\\hinticons.clx");
-
-	if (!hintBox || !hintBoxBackground || !hintIcons) {
-		app_fatal(_("Failed to load UI resources.\n"
-		            "\n"
-		            "Make sure devilutionx.mpq is in the game folder and that it is up to date."));
-	}
+	hintBox = LoadClx("data\\hintbox.clx");
+	hintBoxBackground = LoadClx("data\\hintboxbackground.clx");
+	hintIcons = LoadClx("data\\hinticons.clx");
 }
 
 void FreeModifierHints()

Source/qol/monhealthbar.cpp

@@ -31,16 +31,10 @@ void InitMonsterHealthBar()
 	if (!*sgOptions.Gameplay.enemyHealthBar)
 		return;
 
-	healthBox = LoadOptionalClx("data\\healthbox.clx");
-	health = LoadOptionalClx("data\\health.clx");
-	resistance = LoadOptionalClx("data\\resistance.clx");
-	playerExpTags = LoadOptionalClx("data\\monstertags.clx");
-
-	if (!healthBox || !health || !resistance || !playerExpTags) {
-		app_fatal(_("Failed to load UI resources.\n"
-		            "\n"
-		            "Make sure devilutionx.mpq is in the game folder and that it is up to date."));
-	}
+	healthBox = LoadClx("data\\healthbox.clx");
+	health = LoadClx("data\\health.clx");
+	resistance = LoadClx("data\\resistance.clx");
+	playerExpTags = LoadClx("data\\monstertags.clx");
 
 	std::array<uint8_t, 256> healthBlueTrn;
 	healthBlueTrn[234] = 185;