chore: remove ssh_skip_request_pty

Removes `ssh_skip_request_pty` per comment:

```
// These are deprecated, but we keep them around for BC
// TODO(@mitchellh): remove"
```

Signed-off-by: Ryan Johnson <[email protected]>

Author: tenthirtyam

builder/vmware/common/ssh_config.go

@@ -12,16 +12,9 @@ import (
 
 type SSHConfig struct {
 	Comm communicator.Config `mapstructure:",squash"`
-
-	// These are deprecated, but we keep them around for BC
-	// TODO(@mitchellh): remove
-	SSHSkipRequestPty bool `mapstructure:"ssh_skip_request_pty"`
 }
 
 func (c *SSHConfig) Prepare(ctx *interpolate.Context) []error {
-	if c.SSHSkipRequestPty {
-		c.Comm.SSHPty = false
-	}
 
 	return c.Comm.Prepare(ctx)
 }