Remove "rrthreshold" parameter in transparent-machines scenes

transparent-machines/frame1266.pbrt

@@ -13,7 +13,6 @@ Sampler "halton"
     "integer pixelsamples" [ 64 ]
 Integrator "volpath"
     "integer maxdepth" [ 256 ]
-    "float rrthreshold" [ 0 ]
 
 
 WorldBegin

transparent-machines/frame542.pbrt

@@ -13,7 +13,6 @@ Sampler "halton"
     "integer pixelsamples" [ 1024 ]
 
 Integrator "volpath"
-    "float rrthreshold" [ 0 ]
     "integer maxdepth" [ 256 ]
 
 

transparent-machines/frame675.pbrt

@@ -12,7 +12,6 @@ Film "rgb"
 Sampler "halton"
     "integer pixelsamples" [ 1024 ]
 Integrator "volpath"
-    "float rrthreshold" [ 0 ]
     "integer maxdepth" [ 256 ]
 
 

transparent-machines/frame812.pbrt

@@ -13,7 +13,6 @@ Film "rgb"
 Sampler "halton"
     "integer pixelsamples" [ 1024 ]
 Integrator "volpath"
-    "float rrthreshold" [ 0 ]
     "integer maxdepth" [ 256 ]
 
 

transparent-machines/frame888.pbrt

@@ -14,7 +14,6 @@ Film "rgb"
 Sampler "halton"
     "integer pixelsamples" [ 1024 ]
 Integrator "volpath"
-    "float rrthreshold" [ 0 ]
     "integer maxdepth" [ 256 ]