Fix unused var warning, apply ENABLED

Marlin/src/feature/bedlevel/ubl/ubl_G29.cpp

 
   static uint8_t ubl_state_at_invocation = 0;
 
-  #ifdef UBL_DEVEL_DEBUGGING
+  #if ENABLED(UBL_DEVEL_DEBUGGING)
     static uint8_t ubl_state_recursion_chk = 0;
   #endif
 
   void unified_bed_leveling::save_ubl_active_state_and_disable() {
-    #ifdef UBL_DEVEL_DEBUGGING
+    #if ENABLED(UBL_DEVEL_DEBUGGING)
       ubl_state_recursion_chk++;
       if (ubl_state_recursion_chk != 1) {
         SERIAL_ECHOLNPGM("save_ubl_active_state_and_disabled() called multiple times in a row.");
   }
 
   void unified_bed_leveling::restore_ubl_active_state_and_leave() {
-    #ifdef UBL_DEVEL_DEBUGGING
+    #if ENABLED(UBL_DEVEL_DEBUGGING)
       if (--ubl_state_recursion_chk) {
         SERIAL_ECHOLNPGM("restore_ubl_active_state_and_leave() called too many times.");
         #if ENABLED(NEWPANEL)
     SERIAL_EOL();
     safe_delay(50);
 
-    #ifdef UBL_DEVEL_DEBUGGING
+    #if ENABLED(UBL_DEVEL_DEBUGGING)
       SERIAL_PROTOCOLLNPAIR("ubl_state_at_invocation :", ubl_state_at_invocation);
       SERIAL_EOL();
       SERIAL_PROTOCOLLNPAIR("ubl_state_recursion_chk :", ubl_state_recursion_chk);

Marlin/src/gcode/bedlevel/G26.cpp

 inline bool prime_nozzle() {
 
   #if ENABLED(ULTIPANEL)
-    float Total_Prime = 0.0;
+    #if ENABLED(PREVENT_LENGTHY_EXTRUDE)
+      float Total_Prime = 0.0;
+    #endif
 
     if (g26_prime_flag == -1) {  // The user wants to control how much filament gets purged
 
       while (!is_lcd_clicked()) {
         lcd_chirp();
         destination[E_AXIS] += 0.25;
-        #ifdef PREVENT_LENGTHY_EXTRUDE
+        #if ENABLED(PREVENT_LENGTHY_EXTRUDE)
           Total_Prime += 0.25;
           if (Total_Prime >= EXTRUDE_MAXLENGTH) return G26_ERR;
         #endif