Remove legacy USE_SERIAL define (#18292)

* Remove legacy USE_SERIAL define

* tidy up missed comments

4 files changed, 0 insertions, 8 deletions

diff --git a/keyboards/deltasplit75/keymaps/default/config.h b/keyboards/deltasplit75/keymaps/default/config.h
index 307531da66..7a05469173 100644
--- a/keyboards/deltasplit75/keymaps/default/config.h
+++ b/keyboards/deltasplit75/keymaps/default/config.h
@@ -18,8 +18,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-#define USE_SERIAL
-
 #define MASTER_LEFT
 // #define MASTER_RIGHT
 // #define EE_HANDS
diff --git a/keyboards/deltasplit75/keymaps/itsaferbie/config.h b/keyboards/deltasplit75/keymaps/itsaferbie/config.h
index 24c3d5be23..f837c90ad4 100644
--- a/keyboards/deltasplit75/keymaps/itsaferbie/config.h
+++ b/keyboards/deltasplit75/keymaps/itsaferbie/config.h
@@ -16,8 +16,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 
-#define USE_SERIAL
-
 #define MASTER_LEFT
 // #define MASTER_RIGHT
 // #define EE_HANDS
diff --git a/keyboards/deltasplit75/keymaps/mbsurfer/config.h b/keyboards/deltasplit75/keymaps/mbsurfer/config.h
index f14678a223..2a2e4ece9f 100644
--- a/keyboards/deltasplit75/keymaps/mbsurfer/config.h
+++ b/keyboards/deltasplit75/keymaps/mbsurfer/config.h
@@ -16,8 +16,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 
-#define USE_SERIAL
-
 #define MASTER_LEFT
 // #define MASTER_RIGHT
 // #define EE_HANDS
diff --git a/keyboards/deltasplit75/keymaps/protosplit/config.h b/keyboards/deltasplit75/keymaps/protosplit/config.h
index f14678a223..2a2e4ece9f 100644
--- a/keyboards/deltasplit75/keymaps/protosplit/config.h
+++ b/keyboards/deltasplit75/keymaps/protosplit/config.h
@@ -16,8 +16,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 
-#define USE_SERIAL
-
 #define MASTER_LEFT
 // #define MASTER_RIGHT
 // #define EE_HANDS