Enable unused-function warning for runtime (#4628)

kotlin-native/common/src/hash/cpp/City.cpp

@@ -57,11 +57,6 @@ uint32_t Fetch32(const char *p) {
   return uint32_in_expected_order(UNALIGNED_LOAD32(p));
 }
 
-uint32_t Rotate32(uint32_t val, int shift) {
-  // Avoid shifting by 32: doing so yields an undefined result.
-  return shift == 0 ? val : ((val >> shift) | (val << (32 - shift)));
-}
-
 // Bitwise right rotate.  Normally this will compile to a single
 // instruction, especially if the shift is a manifest constant.
 uint64_t Rotate(uint64_t val, int shift) {

kotlin-native/common/src/hash/cpp/Names.cpp

@@ -23,18 +23,6 @@
 
 namespace {
 
-constexpr uint32_t PrintableHexSize(uint32_t input_length) {
-  return input_length * 2;
-}
-
-void PrintableHex(const uint8_t* data, uint32_t data_length, char* hex) {
-  static const char* hex_digits = "0123456789ABCDEF";
-  for (uint32_t i = 0; i < data_length; ++i) {
-    *hex++ = hex_digits[(*data >> 4) & 0xf];
-    *hex++ = hex_digits[(*data++) & 0xf];
-  }
-}
-
 constexpr uint32_t PrintableBase64Size(uint32_t input_length) {
   return ((input_length + 2) / 3 * 4) + 1;
 }