[mlir] Fix bazel build after c798e19. (#140537)

`@llvm-project//mlir:LLVMDialect` builds fine without the header. Don't
think it was needed.

Author: bartchr808

mlir/lib/Dialect/LLVMIR/IR/LLVMInterfaces.cpp

@@ -12,7 +12,6 @@
 
 #include "mlir/Dialect/LLVMIR/LLVMInterfaces.h"
 
-#include "mlir/Conversion/LLVMCommon/TypeConverter.h"
 #include "mlir/Dialect/LLVMIR/LLVMDialect.h"
 #include "mlir/IR/PatternMatch.h"