Remove duplicated items in the user's inventory

[moonysolari]

This PR fixes these duplicated items:

• The Ancestral Fountain Pen, mentioned in Duplicate Ancestral Fountain Pens in the inventory #106.
• The Tactical Wet Suit in H2/H3. The cause is its two identical versions, one used as the default suit of Nightcall, and the other as the reward of The Mills Reverie. Only the latter appears in the inventory now.
• The Tactical Gear in H1/H2. It was loaded twice, once as TOKEN_OUTFIT_COLORADO_HERO_COLORADOSUIT and another time as TOKEN_OUTFIT_COLORADO_HERO_RABIESSUIT. Only the former appears in the inventory now.