[SYCL-MLIR] Fix merge in #8764 (#8817)

```
mlir-sycl/lib/Conversion/SYCLToLLVM/SYCLToLLVM.cpp:2185:31: error: redeclaration of using declaration
      ConvertSYCLToLLVMPass>::ConvertSYCLToLLVMBase;
      ~~~~~~~~~~~~~~~~~~~~~~~~^
mlir-sycl/lib/Conversion/SYCLToLLVM/SYCLToLLVM.cpp:2181:15: note: previous using declaration
  using Base::Base;
              ^
```

Signed-off-by: Tsang, Whitney <whitney.tsang@intel.com>

Author: whitneywhtsang

mlir-sycl/lib/Conversion/SYCLToLLVM/SYCLToLLVM.cpp

@@ -2178,8 +2178,6 @@ void mlir::populateSYCLToLLVMConversionPatterns(
 namespace {
 class ConvertSYCLToLLVMPass
     : public impl::ConvertSYCLToLLVMBase<ConvertSYCLToLLVMPass> {
-  using Base::Base;
-
 public:
   using impl::ConvertSYCLToLLVMBase<
       ConvertSYCLToLLVMPass>::ConvertSYCLToLLVMBase;