[WebAssembly] Remove redundant namespaces qualifiers. NFC.

include/llvm/BinaryFormat/Wasm.h

enum class ValType {
   I64 = WASM_TYPE_I64,
   F32 = WASM_TYPE_F32,
   F64 = WASM_TYPE_F64,
   V128 = WASM_TYPE_V128,
   EXCEPT_REF = WASM_TYPE_EXCEPT_REF,
 };
 
 struct WasmSignature {
-  SmallVector<wasm::ValType, 1> Returns;
-  SmallVector<wasm::ValType, 4> Params;
+  SmallVector<ValType, 1> Returns;
+  SmallVector<ValType, 4> Params;
   // Support empty and tombstone instances, needed by DenseMap.
   enum { Plain, Empty, Tombstone } State = Plain;
 
-  WasmSignature(SmallVector<wasm::ValType, 1> &&InReturns,
-                SmallVector<wasm::ValType, 4> &&InParams)
+  WasmSignature(SmallVector<ValType, 1> &&InReturns,
+                SmallVector<ValType, 4> &&InParams)
       : Returns(InReturns), Params(InParams) {}
   WasmSignature() = default;
 };
 
 // Useful comparison operators
 inline bool operator==(const WasmSignature &LHS, const WasmSignature &RHS) {
   return LHS.State == RHS.State && LHS.Returns == RHS.Returns &&
          LHS.Params == RHS.Params;
 }
 
 inline bool operator!=(const WasmSignature &LHS, const WasmSignature &RHS) {
   return !(LHS == RHS);
 }
 
 inline bool operator==(const WasmGlobalType &LHS, const WasmGlobalType &RHS) {
   return LHS.Type == RHS.Type && LHS.Mutable == RHS.Mutable;
 }
 
 inline bool operator!=(const WasmGlobalType &LHS, const WasmGlobalType &RHS) {
   return !(LHS == RHS);
 }
 
-std::string toString(wasm::WasmSymbolType type);
+std::string toString(WasmSymbolType type);
 std::string relocTypetoString(uint32_t type);
 
 } // end namespace wasm
 } // end namespace llvm
 
 #endif