all: Remove unused method receivers (#8462)

Co-authored-by: deepsource-autofix[bot] <62050782+deepsource-autofix[bot]@users.noreply.github.com>

lib/config/commit_test.go

@@ -34,7 +34,7 @@ type validationError struct{}
 func (validationError) VerifyConfiguration(_, _ Configuration) error {
 	return errors.New("some error")
 }
-func (c validationError) CommitConfiguration(_, _ Configuration) bool {
+func (validationError) CommitConfiguration(_, _ Configuration) bool {
 	return true
 }
 func (validationError) String() string {

lib/config/guiconfiguration.go

@@ -21,7 +21,7 @@ func (c GUIConfiguration) IsAuthEnabled() bool {
 	return c.AuthMode == AuthModeLDAP || (len(c.User) > 0 && len(c.Password) > 0)
 }
 
-func (c GUIConfiguration) IsOverridden() bool {
+func (GUIConfiguration) IsOverridden() bool {
 	return os.Getenv("STGUIADDRESS") != ""
 }