Fix ABL broken by recent change

Marlin/Marlin_main.cpp

@@ -4617,11 +4617,11 @@ void home_all_axes() { gcode_G28(true); }
 
         #if ENABLED(AUTO_BED_LEVELING_LINEAR)
 
-//        mean += measured_z;                                  // I believe this is unused code?
-//        eqnBVector[abl_probe_index] = measured_z;            // I believe this is unused code?
-//        eqnAMatrix[abl_probe_index + 0 * abl2] = xProbe;     // I believe this is unused code?
-//        eqnAMatrix[abl_probe_index + 1 * abl2] = yProbe;     // I believe this is unused code?
-//        eqnAMatrix[abl_probe_index + 2 * abl2] = 1;          // I believe this is unused code?
+          mean += measured_z;
+          eqnBVector[abl_probe_index] = measured_z;
+          eqnAMatrix[abl_probe_index + 0 * abl2] = xProbe;
+          eqnAMatrix[abl_probe_index + 1 * abl2] = yProbe;
+          eqnAMatrix[abl_probe_index + 2 * abl2] = 1;
 
         #elif ENABLED(AUTO_BED_LEVELING_BILINEAR)
 
@@ -4797,9 +4797,6 @@ void home_all_axes() { gcode_G28(true); }
 
               incremental_LSF(&lsf_results, xProbe, yProbe, measured_z);
 
-          #if ENABLED(AUTO_BED_LEVELING_LINEAR)
-            indexIntoAB[xCount][yCount] = abl_probe_index;
-          #endif
             #elif ENABLED(AUTO_BED_LEVELING_BILINEAR)
 
               z_values[xCount][yCount] = measured_z + zoffset;
@@ -4924,11 +4921,10 @@ void home_all_axes() { gcode_G28(true); }
       }
 
       // Create the matrix but don't correct the position yet
-      if (!dryrun) {
+      if (!dryrun)
         planner.bed_level_matrix = matrix_3x3::create_look_at(
-          vector_3(-plane_equation_coefficients[0], -plane_equation_coefficients[1], 1)    // We can eleminate the '-' here and up above
+          vector_3(-plane_equation_coefficients[0], -plane_equation_coefficients[1], 1)    // We can eliminate the '-' here and up above
         );
-      }
 
       // Show the Topography map if enabled
       if (do_topography_map) {