Clang-tidy: readability-redundant-control-flow

Source/dx.cpp

@@ -236,7 +236,6 @@ void Blit(SDL_Surface *src, SDL_Rect *src_rect, SDL_Rect *dst_rect)
 #ifndef USE_SDL1
 	if (SDL_BlitSurface(src, src_rect, dst, dst_rect) < 0)
 		ErrSdl();
-	return;
 #else
 	if (!OutputRequiresScaling()) {
 		if (SDL_BlitSurface(src, src_rect, dst, dst_rect) < 0)

Source/items.cpp

@@ -2442,8 +2442,6 @@ void SpawnUnique(_unique_items uid, Point position)
 	GetItemAttrs(ii, idx, curlv);
 	GetUniqueItem(ii, uid);
 	SetupItem(ii);
-
-	return;
 }
 
 void ItemRndDur(int ii)

Source/missiles.cpp

@@ -3067,7 +3067,6 @@ static int Sentfire(int i, Point src)
 
 void MI_Dummy(int i)
 {
-	return;
 }
 
 void MI_Golem(int i)