diff --git a/gwinc/ifo/aLIGO/ifo.yaml b/gwinc/ifo/aLIGO/ifo.yaml
index b69056802db66b8173fbd08dc605dda4e743601e..3b45b7fdabe0be95f31de4d5aeda8713e5055207 100644
--- a/gwinc/ifo/aLIGO/ifo.yaml
+++ b/gwinc/ifo/aLIGO/ifo.yaml
@@ -203,14 +203,6 @@ Materials:
Indexhighn: 2.09 # 2020 LMA
Phihighn: 3.89e-4 # loss angle at 100Hz (Gras 2020)
Phihighn_slope: 0.1
- # Following are optional parameters to for providing separate Bulk and
- # Shear loss angles and to include photoelastic effect in Coatings
- # Brownian noise calculation.
- # lossBhighn: 3.89e-4 # Bulk loss angle at 100 Hz
- # lossBhighn_slope: 0.1 # Bulk loss angle slope
- # lossShighn: 3.89e-4 # Shear loss angle at 100 Hz
- # lossShighn_slope: 0.1 # Shear loss angle slope
- # PEThighn: 0.1095 # Hong et al . PRD 87, 082001 (2013) A.1
## low index material: silica
Ylown: 70e9 # 2020 LMA
@@ -225,18 +217,6 @@ Materials:
# slopes between 0 and 0.3, depending on
# deposition method. Slawek's analysis in
# 10.1103/PhysRevD.98.122001 assumes zero slope.
- # Following are optional parameters to for providing separate Bulk and
- # Shear loss angles and to include photoelastic effect in Coatings
- # Brownian noise calculation.
- # lossBlown: 2.3e-5 # Bulk loss angle at 100 Hz
- # lossBlown_slope: 0 # Bulk loss angle slope
- # lossSlown: 2.3e-5 # Shear loss angle at 100 Hz
- # lossSlown_slope: 0 # Shear loss angle slope
- # PETlown: 0.269 # Hong et al . PRD 87, 082001 (2013) A.1
-
- # Indicator for including effect of amplitude noise due to coatings
- # brownian noise. Set to 'yes' for including. Otherwise would be ignored.
- # IncCoatBrAmpNoise: 'yes' # Hong et al . PRD 87, 082001 (2013) II.E
## Substrate Material parameters--------------------------------------------
Substrate: