diff --git a/engines/release/_calib_c.json b/engines/release/_calib_c.json
deleted file mode 100644
index c879a09..0000000
--- a/engines/release/_calib_c.json
+++ /dev/null
@@ -1 +0,0 @@
-{"n_atoms": 40, "nt": 10000, "step_time": 3.113259077072144e-05}
\ No newline at end of file
diff --git a/engines/release/_calib_fortran.json b/engines/release/_calib_fortran.json
deleted file mode 100644
index 3ec89e5..0000000
--- a/engines/release/_calib_fortran.json
+++ /dev/null
@@ -1 +0,0 @@
-{"n_atoms": 40, "nt": 200000, "step_time": 0.0002908185601234436}
\ No newline at end of file
diff --git a/engines/release/c.json b/engines/release/c.json
deleted file mode 100644
index 897910a..0000000
--- a/engines/release/c.json
+++ /dev/null
@@ -1,51 +0,0 @@
-{
-  "box_a": 300.0,
-  "NT": 10000,
-  "DT": 0.001,
-  "NSTEP": 20,
-  "warmup_steps": 0,
-  "method": "leapfrog",
-  "G": [
-    0.0,
-    0.0,
-    0.0
-  ],
-  "B": [
-    0.005,
-    0.0,
-    0.005
-  ],
-  "gravity_field": 0,
-  "gravity_interaction": 0,
-  "elastic_force": 1,
-  "damping_force": 0,
-  "gravity_strength": 1.0,
-  "driving_force": 1,
-  "save_trajectory": 0,
-  "alpha": [
-    0.0,
-    0.0,
-    0.0,
-    0.0,
-    0.0,
-    0.0
-  ],
-  "ball_radius": 0.5,
-  "ball_color": [
-    0.2,
-    0.6,
-    0.9
-  ],
-  "box_color": [
-    0.8,
-    0.8,
-    0.85
-  ],
-  "use_marker": 1,
-  "camera_distance": 120.0,
-  "camera_elevation": 0.0,
-  "camera_azimuth": 0.0,
-  "camera_center_x": 60.0,
-  "camera_center_y": 0.0,
-  "camera_center_z": 0.0
-}
\ No newline at end of file
diff --git a/engines/release/fortran.json b/engines/release/fortran.json
deleted file mode 100644
index a25e603..0000000
--- a/engines/release/fortran.json
+++ /dev/null
@@ -1,51 +0,0 @@
-{
-  "box_a": 300.0,
-  "NT": 200000,
-  "DT": 0.001,
-  "NSTEP": 100,
-  "warmup_steps": 0,
-  "method": "leapfrog",
-  "G": [
-    0.0,
-    0.0,
-    0.0
-  ],
-  "B": [
-    0.005,
-    0.0,
-    0.005
-  ],
-  "gravity_field": 0,
-  "gravity_interaction": 0,
-  "elastic_force": 1,
-  "damping_force": 0,
-  "gravity_strength": 1.0,
-  "driving_force": 1,
-  "save_trajectory": 0,
-  "alpha": [
-    0.0,
-    0.0,
-    0.0,
-    0.0,
-    0.0,
-    0.0
-  ],
-  "ball_radius": 0.5,
-  "ball_color": [
-    0.2,
-    0.6,
-    0.9
-  ],
-  "box_color": [
-    0.8,
-    0.8,
-    0.85
-  ],
-  "use_marker": 1,
-  "camera_distance": 60.0,
-  "camera_elevation": 0.0,
-  "camera_azimuth": 0.0,
-  "camera_center_x": 30.0,
-  "camera_center_y": 0.0,
-  "camera_center_z": 0.0
-}
\ No newline at end of file