Leave out "Unable to create client" in error msg

This bit of extra text ends up creating very long error messages, and
only to say that the user isn't logged in, so this commit removes it.

Author: thebaer

api/api.go

@@ -61,7 +61,7 @@ func DoFetch(c *cli.Context, friendlyID string) error {
 func DoFetchPosts(c *cli.Context) ([]writeas.Post, error) {
 	cl, err := newClient(c, true)
 	if err != nil {
-		return nil, fmt.Errorf("Unable to create client: %v", err)
+		return nil, fmt.Errorf("%v", err)
 	}
 
 	posts, err := cl.GetUserPosts()
@@ -77,7 +77,7 @@ func DoFetchPosts(c *cli.Context) ([]writeas.Post, error) {
 func DoPost(c *cli.Context, post []byte, font string, encrypt, code bool) (*writeas.Post, error) {
 	cl, err := newClient(c, false)
 	if err != nil {
-		return nil, fmt.Errorf("Unable to create client: %v", err)
+		return nil, fmt.Errorf("%v", err)
 	}
 
 	pp := &writeas.PostParams{
@@ -167,7 +167,7 @@ func DoFetchCollections(c *cli.Context) ([]RemoteColl, error) {
 func DoUpdate(c *cli.Context, post []byte, friendlyID, token, font string, code bool) error {
 	cl, err := newClient(c, false)
 	if err != nil {
-		return fmt.Errorf("Unable to create client: %v", err)
+		return fmt.Errorf("%v", err)
 	}
 
 	params := writeas.PostParams{}
@@ -193,7 +193,7 @@ func DoUpdate(c *cli.Context, post []byte, friendlyID, token, font string, code
 func DoDelete(c *cli.Context, friendlyID, token string) error {
 	cl, err := newClient(c, false)
 	if err != nil {
-		return fmt.Errorf("Unable to create client: %v", err)
+		return fmt.Errorf("%v", err)
 	}
 
 	err = cl.DeletePost(friendlyID, token)
@@ -212,7 +212,7 @@ func DoDelete(c *cli.Context, friendlyID, token string) error {
 func DoLogIn(c *cli.Context, username, password string) error {
 	cl, err := newClient(c, false)
 	if err != nil {
-		return fmt.Errorf("Unable to create client: %v", err)
+		return fmt.Errorf("%v", err)
 	}
 
 	u, err := cl.LogIn(username, password)
@@ -234,7 +234,7 @@ func DoLogIn(c *cli.Context, username, password string) error {
 func DoLogOut(c *cli.Context) error {
 	cl, err := newClient(c, true)
 	if err != nil {
-		return fmt.Errorf("Unable to create client: %v", err)
+		return fmt.Errorf("%v", err)
 	}
 
 	err = cl.LogOut()