Removed setting which has had no effect since at least rev. 4115, and which now causes failure due to improved BoneAnimation code which correctly detects that the data required for interpolation is not present.
Removed setting which has had no effect since at least rev. 4115, and which now causes failure due to improved BoneAnimation code which correctly detects that the data required for interpolation is not present.

git-svn-id: 5afc437a751a4ff2ced778146f5faadda0b504ab@4145 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

chototsu/MikuMikuStudio,chototsu/MikuMikuStudio,chototsu/MikuMikuStudio,chototsu/MikuMikuStudio