Revert "Switch to new vendor directory layout"

This reverts commit d5742209d3.

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

vendor/github.com/Azure/go-ansiterm/states.go

@@ -1,71 +0,0 @@
-package ansiterm
-
-type StateId int
-
-type State interface {
-	Enter() error
-	Exit() error
-	Handle(byte) (State, error)
-	Name() string
-	Transition(State) error
-}
-
-type BaseState struct {
-	name   string
-	parser *AnsiParser
-}
-
-func (base BaseState) Enter() error {
-	return nil
-}
-
-func (base BaseState) Exit() error {
-	return nil
-}
-
-func (base BaseState) Handle(b byte) (s State, e error) {
-
-	switch {
-	case b == CSI_ENTRY:
-		return base.parser.CsiEntry, nil
-	case b == DCS_ENTRY:
-		return base.parser.DcsEntry, nil
-	case b == ANSI_ESCAPE_PRIMARY:
-		return base.parser.Escape, nil
-	case b == OSC_STRING:
-		return base.parser.OscString, nil
-	case sliceContains(ToGroundBytes, b):
-		return base.parser.Ground, nil
-	}
-
-	return nil, nil
-}
-
-func (base BaseState) Name() string {
-	return base.name
-}
-
-func (base BaseState) Transition(s State) error {
-	if s == base.parser.Ground {
-		execBytes := []byte{0x18}
-		execBytes = append(execBytes, 0x1A)
-		execBytes = append(execBytes, getByteRange(0x80, 0x8F)...)
-		execBytes = append(execBytes, getByteRange(0x91, 0x97)...)
-		execBytes = append(execBytes, 0x99)
-		execBytes = append(execBytes, 0x9A)
-
-		if sliceContains(execBytes, base.parser.context.currentChar) {
-			return base.parser.execute()
-		}
-	}
-
-	return nil
-}
-
-type DcsEntryState struct {
-	BaseState
-}
-
-type ErrorState struct {
-	BaseState
-}