Simplify.

Author: maleadt

src/jitlayers.cpp

@@ -1385,13 +1385,13 @@ namespace {
 #endif
         if (TheTriple.isAArch64())
             codemodel = CodeModel::Small;
+#if JL_LLVM_VERSION < 200000
         else if (TheTriple.isRISCV()) {
-#if JL_LLVM_VERSION >= 200000
-            codemodel = CodeModel::Large;
-#else
+            // RISC-V only supports large code model in LLVM 20
+            // https://github.com/llvm/llvm-project/pull/70308
             codemodel = CodeModel::Medium;
-#endif
         }
+#endif
         // Generate simpler code for JIT
         Reloc::Model relocmodel = Reloc::Static;
         if (TheTriple.isRISCV()) {