[llvm] Stop including llvm/ADT/StringMap.h (NFC)

Identified with clangd.

Author: kazutakahirata

llvm/include/llvm/DebugInfo/LogicalView/Readers/LVCodeViewVisitor.h

@@ -14,7 +14,6 @@
 #ifndef LLVM_DEBUGINFO_LOGICALVIEW_READERS_CODEVIEWVISITOR_H
 #define LLVM_DEBUGINFO_LOGICALVIEW_READERS_CODEVIEWVISITOR_H
 
-#include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/iterator.h"
 #include "llvm/DebugInfo/CodeView/SymbolDumpDelegate.h"
 #include "llvm/DebugInfo/CodeView/SymbolVisitorCallbacks.h"

llvm/include/llvm/ExecutionEngine/Orc/ExecutionUtils.h

@@ -13,7 +13,6 @@
 #ifndef LLVM_EXECUTIONENGINE_ORC_EXECUTIONUTILS_H
 #define LLVM_EXECUTIONENGINE_ORC_EXECUTIONUTILS_H
 
-#include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/iterator_range.h"
 #include "llvm/ExecutionEngine/JITSymbol.h"
 #include "llvm/ExecutionEngine/Orc/Core.h"

llvm/include/llvm/ExecutionEngine/Orc/ObjectLinkingLayer.h

@@ -15,7 +15,6 @@
 #define LLVM_EXECUTIONENGINE_ORC_OBJECTLINKINGLAYER_H
 
 #include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ExecutionEngine/JITLink/JITLink.h"
 #include "llvm/ExecutionEngine/JITSymbol.h"

llvm/include/llvm/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.h

@@ -14,7 +14,6 @@
 #define LLVM_EXECUTIONENGINE_ORC_RTDYLDOBJECTLINKINGLAYER_H
 
 #include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ExecutionEngine/JITEventListener.h"
 #include "llvm/ExecutionEngine/JITSymbol.h"

llvm/include/llvm/ExecutionEngine/Orc/Shared/OrcRTBridge.h

@@ -13,7 +13,6 @@
 #ifndef LLVM_EXECUTIONENGINE_ORC_SHARED_ORCRTBRIDGE_H
 #define LLVM_EXECUTIONENGINE_ORC_SHARED_ORCRTBRIDGE_H
 
-#include "llvm/ADT/StringMap.h"
 #include "llvm/ExecutionEngine/Orc/Shared/ExecutorAddress.h"
 #include "llvm/ExecutionEngine/Orc/Shared/SimpleRemoteEPCUtils.h"
 #include "llvm/ExecutionEngine/Orc/Shared/TargetProcessControlTypes.h"