Revert "[clangd] Allow hover over 128-bit variable without crashing (#71415)"

This reverts commit 2626916.

It failed on buildbots not supporting __int128_t.

Author: bjope

clang-tools-extra/clangd/Hover.cpp

@@ -408,9 +408,7 @@ void fillFunctionTypeAndParams(HoverInfo &HI, const Decl *D,
 // -2    => 0xfffffffe
 // -2^32 => 0xffffffff00000000
 static llvm::FormattedNumber printHex(const llvm::APSInt &V) {
-  assert(V.getSignificantBits() <= 64 && "Can't print more than 64 bits.");
-  uint64_t Bits =
-      V.getBitWidth() > 64 ? V.trunc(64).getZExtValue() : V.getZExtValue();
+  uint64_t Bits = V.getZExtValue();
   if (V.isNegative() && V.getSignificantBits() <= 32)
     return llvm::format_hex(uint32_t(Bits), 0);
   return llvm::format_hex(Bits, 0);

clang-tools-extra/clangd/unittests/HoverTests.cpp

@@ -3349,17 +3349,6 @@ TEST(Hover, NoCrashAPInt64) {
   getHover(AST, T.point(), format::getLLVMStyle(), nullptr);
 }
 
-TEST(Hover, NoCrashInt128) {
-  Annotations T(R"cpp(
-    constexpr __int128_t value = -4;
-    void foo() { va^lue; }
-  )cpp");
-  auto AST = TestTU::withCode(T.code()).build();
-  auto H = getHover(AST, T.point(), format::getLLVMStyle(), nullptr);
-  ASSERT_TRUE(H);
-  EXPECT_EQ(H->Value, "-4 (0xfffffffc)");
-}
-
 TEST(Hover, DocsFromMostSpecial) {
   Annotations T(R"cpp(
   // doc1