Remove unused generic functions

Sources/CryptoSwift/Generics.swift

@@ -53,83 +53,3 @@ func arrayOfBytes<T: Integer>(value: T, length totalBytes: Int = MemoryLayout<T>
 
     return bytes
 }
-
-// MARK: - shiftLeft
-
-// helper to be able to make shift operation on T
-@_specialize(Int)
-func << <T: SignedInteger>(lhs: T, rhs: Int) -> Int {
-    let a = lhs as! Int
-    let b = rhs
-    return a << b
-}
-
-@_specialize(UInt)
-func << <T: UnsignedInteger>(lhs: T, rhs: Int) -> UInt {
-    let a = lhs as! UInt
-    let b = rhs
-    return a << b
-}
-
-// Generic function itself
-// FIXME: this generic function is not as generic as I would. It crashes for smaller types
-@_specialize(Int)
-func shiftLeft<T: SignedInteger>(_ value: T, by count: Int) -> T where T: Initiable {
-    if (value == 0) {
-        return 0
-    }
-
-    let bitsCount = (MemoryLayout<T>.size * 8)
-    let shiftCount = Int(Swift.min(count, bitsCount - 1))
-
-    var shiftedValue: T = 0
-    for bitIdx in 0 ..< bitsCount {
-        let bit = T(IntMax(1 << bitIdx))
-        if ((value & bit) == bit) {
-            shiftedValue = shiftedValue | T(bit << shiftCount)
-        }
-    }
-
-    if (shiftedValue != 0 && count >= bitsCount) {
-        // clear last bit that couldn't be shifted out of range
-        shiftedValue = shiftedValue & T(~(1 << (bitsCount - 1)))
-    }
-    return shiftedValue
-}
-
-// for any f*** other Integer type - this part is so non-Generic
-func shiftLeft(_ value: UInt, by count: Int) -> UInt {
-    return UInt(shiftLeft(Int(value), by: count))
-}
-
-func shiftLeft(_ value: UInt8, by count: Int) -> UInt8 {
-    return UInt8(shiftLeft(UInt(value), by: count))
-}
-
-func shiftLeft(_ value: UInt16, by count: Int) -> UInt16 {
-    return UInt16(shiftLeft(UInt(value), by: count))
-}
-
-func shiftLeft(_ value: UInt32, by count: Int) -> UInt32 {
-    return UInt32(shiftLeft(UInt(value), by: count))
-}
-
-func shiftLeft(_ value: UInt64, by count: Int) -> UInt64 {
-    return UInt64(shiftLeft(UInt(value), by: count))
-}
-
-func shiftLeft(_ value: Int8, by count: Int) -> Int8 {
-    return Int8(shiftLeft(Int(value), by: count))
-}
-
-func shiftLeft(_ value: Int16, by count: Int) -> Int16 {
-    return Int16(shiftLeft(Int(value), by: count))
-}
-
-func shiftLeft(_ value: Int32, by count: Int) -> Int32 {
-    return Int32(shiftLeft(Int(value), by: count))
-}
-
-func shiftLeft(_ value: Int64, by count: Int) -> Int64 {
-    return Int64(shiftLeft(Int(value), by: count))
-}