Revert "[clang][bytecode] Implement bitcasts to floating-point values (#114485)"

This reverts commit c752efb.

This broke bots:
 - https://lab.llvm.org/buildbot/#/builders/13/builds/3268
 - https://lab.llvm.org/buildbot/#/builders/42/builds/1718

Author: tbaederr

clang/lib/AST/ByteCode/Interp.h

@@ -3062,8 +3062,7 @@ inline bool BitCast(InterpState &S, CodePtr OpPC, bool TargetIsUCharOrByte,
     return false;
 
   if constexpr (std::is_same_v<T, Floating>) {
-    assert(Sem);
-    S.Stk.push<Floating>(T::bitcastFromMemory(Buff.data(), *Sem));
+    assert(false && "Implement bitcasting to a floating type");
   } else {
     assert(!Sem);
     S.Stk.push<T>(T::bitcastFromMemory(Buff.data(), ResultBitWidth));

clang/test/AST/ByteCode/builtin-bit-cast-long-double.cpp

@@ -76,8 +76,6 @@ static_assert(check_round_trip<__int128_t>((__int128_t)34));
 static_assert(check_round_trip<__int128_t>((__int128_t)-34));
 #endif
 
-static_assert(check_round_trip<double>(17.0));
-
 
 namespace simple {
   constexpr int A = __builtin_bit_cast(int, 10);
@@ -110,7 +108,7 @@ namespace simple {
   static_assert(check_round_trip<unsigned>((int)0x12345678));
   static_assert(check_round_trip<unsigned>((int)0x87654321));
   static_assert(check_round_trip<unsigned>((int)0x0C05FEFE));
-  static_assert(round_trip<float>((int)0x0C05FEFE));
+  // static_assert(round_trip<float>((int)0x0C05FEFE));
 
 
   /// This works in GCC and in the bytecode interpreter, but the current interpreter