[WebAssembly] Delete unused using statements (NFC)

Reviewers: sbc100, dschuff

Subscribers: mehdi_amini, jgravelle-google, sunfish, steven_wu, dexonsmith, llvm-commits

Differential Revision: https://reviews.llvm.org/D54683

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@347370 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/wasm/InputFiles.h b/wasm/InputFiles.h
index ec77446..948cf91 100644
--- a/wasm/InputFiles.h
+++ b/wasm/InputFiles.h
@@ -24,10 +24,7 @@
 using llvm::object::WasmObjectFile;
 using llvm::object::WasmSection;
 using llvm::object::WasmSymbol;
-using llvm::wasm::WasmGlobal;
-using llvm::wasm::WasmImport;
 using llvm::wasm::WasmRelocation;
-using llvm::wasm::WasmSignature;
 
 namespace llvm {
 namespace lto {
diff --git a/wasm/InputGlobal.h b/wasm/InputGlobal.h
index 37d0ab9..fd53430 100644
--- a/wasm/InputGlobal.h
+++ b/wasm/InputGlobal.h
@@ -17,7 +17,6 @@
 #include "llvm/Object/Wasm.h"
 
 using llvm::wasm::WasmGlobal;
-using llvm::wasm::WasmInitExpr;
 
 namespace lld {
 namespace wasm {
diff --git a/wasm/LTO.cpp b/wasm/LTO.cpp
index 73a5c1b..ca227b4 100644
--- a/wasm/LTO.cpp
+++ b/wasm/LTO.cpp
@@ -36,8 +36,6 @@
 #include <vector>
 
 using namespace llvm;
-using namespace llvm::object;
-
 using namespace lld;
 using namespace lld::wasm;
 
diff --git a/wasm/MarkLive.cpp b/wasm/MarkLive.cpp
index dfaa712..7f4696b 100644
--- a/wasm/MarkLive.cpp
+++ b/wasm/MarkLive.cpp
@@ -30,8 +30,6 @@
 
 using namespace llvm;
 using namespace llvm::wasm;
-using namespace lld;
-using namespace lld::wasm;
 
 void lld::wasm::markLive() {
   if (!Config->GcSections)
diff --git a/wasm/Symbols.h b/wasm/Symbols.h
index fc4a5f4..06ed0fe 100644
--- a/wasm/Symbols.h
+++ b/wasm/Symbols.h
@@ -16,8 +16,6 @@
 #include "llvm/Object/Wasm.h"
 
 using llvm::object::Archive;
-using llvm::object::WasmSymbol;
-using llvm::wasm::WasmGlobal;
 using llvm::wasm::WasmGlobalType;
 using llvm::wasm::WasmSignature;
 using llvm::wasm::WasmSymbolType;
diff --git a/wasm/WriterUtils.cpp b/wasm/WriterUtils.cpp
index 6de48d9..778b6d2 100644
--- a/wasm/WriterUtils.cpp
+++ b/wasm/WriterUtils.cpp
@@ -17,7 +17,6 @@
 
 using namespace llvm;
 using namespace llvm::wasm;
-using namespace lld::wasm;
 
 namespace lld {