Remove unused function LLVMRustGetValueContext()

Refs #46437

src/librustc_llvm/ffi.rs

@@ -538,9 +538,6 @@ pub enum ModuleBuffer {}
     /// See llvm::LLVMTypeKind::getTypeID.
     pub fn LLVMRustGetTypeKind(Ty: TypeRef) -> TypeKind;
 
-    /// See llvm::Value::getContext
-    pub fn LLVMRustGetValueContext(V: ValueRef) -> ContextRef;
-
     // Operations on integer types
     pub fn LLVMInt1TypeInContext(C: ContextRef) -> TypeRef;
     pub fn LLVMInt8TypeInContext(C: ContextRef) -> TypeRef;

src/rustllvm/RustWrapper.cpp

@@ -1348,10 +1348,6 @@ extern "C" bool LLVMRustConstInt128Get(LLVMValueRef CV, bool sext, uint64_t *hig
     return true;
 }
 
-extern "C" LLVMContextRef LLVMRustGetValueContext(LLVMValueRef V) {
-  return wrap(&unwrap(V)->getContext());
-}
-
 enum class LLVMRustVisibility {
   Default = 0,
   Hidden = 1,