Delete the CalendarData workaround (#2403)

Author: SingleAccretion

src/coreclr/jit/llvm.h

@@ -428,7 +428,7 @@ class Llvm
 private:
     const unsigned ROOT_FUNC_IDX = 0;
 
-    bool initializeFunctions();
+    void initializeFunctions();
     void generateProlog();
     void initializeShadowStack();
     void initializeLocals();

src/coreclr/jit/llvmcodegen.cpp

@@ -14,11 +14,7 @@
 //
 void Llvm::Compile()
 {
-    if (initializeFunctions())
-    {
-        return;
-    }
-
+    initializeFunctions();
     initializeDebugInfo();
 
     JITDUMPEXEC(_compiler->fgDispBasicBlocks());
@@ -41,7 +37,7 @@ void Llvm::Compile()
     verifyGeneratedCode();
 }
 
-bool Llvm::initializeFunctions()
+void Llvm::initializeFunctions()
 {
     const char* mangledName = GetMangledMethodName(m_info->compMethodHnd);
     Function* rootLlvmFunction = getOrCreateKnownLlvmFunction(mangledName, [=]() { return createFunctionType(); });
@@ -60,15 +56,6 @@ bool Llvm::initializeFunctions()
         rootLlvmFunction->addFnAttr(llvm::Attribute::NoInline);
     }
 
-    // TODO-LLVM: investigate.
-    if (!strcmp(mangledName, "S_P_CoreLib_System_Globalization_CalendarData__EnumCalendarInfo"))
-    {
-        llvm::BasicBlock* llvmBlock = llvm::BasicBlock::Create(m_context->Context, "", rootLlvmFunction);
-        _builder.SetInsertPoint(llvmBlock);
-        _builder.CreateRet(_builder.getInt8(0));
-        return true;
-    }
-
     // First function is always the root.
     m_functions = std::vector<FunctionInfo>(_compiler->compFuncCount());
     m_functions[ROOT_FUNC_IDX] = {rootLlvmFunction};
@@ -182,8 +169,6 @@ bool Llvm::initializeFunctions()
 
         m_EHUnwindLlvmBlocks[ehIndex] = dispatchLlvmBlock;
     }
-
-    return false;
 }
 
 void Llvm::generateProlog()