diff --git a/db/src/kvdb.rs b/db/src/kvdb.rs
index 4d4d8226..64cc74c9 100644
--- a/db/src/kvdb.rs
+++ b/db/src/kvdb.rs
@@ -6,12 +6,6 @@ use elastic_array::*;
 use std::default::Default;
 use rocksdb::{DB, Writable, WriteBatch, WriteOptions, IteratorMode, DBIterator,
 	Options, DBCompactionStyle, BlockBasedOptions, Cache, Column, ReadOptions};
-#[cfg(target_os = "linux")]
-use regex::Regex;
-#[cfg(target_os = "linux")]
-use std::process::Command;
-#[cfg(target_os = "linux")]
-use std::fs::File;
 use std::collections::HashMap;
 use byteorder::{LittleEndian, ByteOrder};
 //use std::path::Path;
@@ -129,25 +123,6 @@ impl Default for CompactionProfile {
 	}
 }
 
-/// Given output of df command return Linux rotational flag file path.
-#[cfg(target_os = "linux")]
-pub fn rotational_from_df_output(df_out: Vec<u8>) -> Option<PathBuf> {
-	str::from_utf8(df_out.as_slice())
-		.ok()
-		// Get the drive name.
-		.and_then(|df_str| Regex::new(r"/dev/(sd[:alpha:]{1,2})")
-			.ok()
-			.and_then(|re| re.captures(df_str))
-			.and_then(|captures| captures.at(1)))
-		// Generate path e.g. /sys/block/sda/queue/rotational
-		.map(|drive_path| {
-			let mut p = PathBuf::from("/sys/block");
-			p.push(drive_path);
-			p.push("queue/rotational");
-			p
-		})
-}
-
 impl CompactionProfile {
 
 	/// Default profile suitable for SSD storage