Remove unused functions from utils

include/utils.h

@@ -41,17 +41,6 @@ auto as(P* p) {
 	return static_cast<std::conditional_t<std::is_const_v<P>, const T*, T*>>(p);
 }
 
-template <typename BitMaskT>
-constexpr inline uint32_t popcount(const BitMaskT bit_mask) noexcept {
-	static_assert(std::is_integral_v<BitMaskT> && std::is_unsigned_v<BitMaskT>, "popcount argument needs to be an unsigned integer type.");
-
-	uint32_t counter = 0;
-	for(auto b = bit_mask; b; b >>= 1) {
-		counter += b & 1;
-	}
-	return counter;
-}
-
 // Implementation from Boost.ContainerHash, licensed under the Boost Software License, Version 1.0.
 inline void hash_combine(std::size_t& seed, std::size_t value) { seed ^= value + 0x9e3779b9 + (seed << 6) + (seed >> 2); }
 
@@ -195,12 +184,6 @@ bool contains(const Container& container, const Key& key) {
 	}
 }
 
-template <typename Container, typename Predicate>
-void erase_if(Container& container, const Predicate& predicate) {
-	using std::begin, std::end;
-	container.erase(std::remove_if(begin(container), end(container), predicate), end(container));
-}
-
 /// Replaces all occurrences of `pattern` in `in` with `with`. If `pattern` is empty, returns the input string unchanged.
 std::string replace_all(const std::string_view& input, const std::string_view& pattern, const std::string_view& replacement);