Cleanup superflous import from old versions

Author: TheDan64

src/builder.rs

@@ -9,7 +9,9 @@ use llvm_sys::{LLVMTypeKind};
 
 use crate::{AtomicOrdering, AtomicRMWBinOp, IntPredicate, FloatPredicate};
 use crate::basic_block::BasicBlock;
-use crate::values::{AggregateValue, AggregateValueEnum, AsValueRef, BasicValue, BasicValueEnum, PhiValue, FunctionValue, IntValue, PointerValue, StructValue, VectorValue, InstructionValue, GlobalValue, IntMathValue, FloatMathValue, PointerMathValue, InstructionOpcode, CallSiteValue};
+use crate::values::{AggregateValue, AggregateValueEnum, AsValueRef, BasicValue, BasicValueEnum, PhiValue, FunctionValue, IntValue, PointerValue, VectorValue, InstructionValue, GlobalValue, IntMathValue, FloatMathValue, PointerMathValue, InstructionOpcode, CallSiteValue};
+#[llvm_versions(3.9..=latest)]
+use crate::values::StructValue;
 use crate::types::{AsTypeRef, BasicType, IntMathType, FloatMathType, PointerType, PointerMathType};
 
 use std::ffi::CString;