Remove obsolete train split shards

cylinderTorsion3D/train-00000-of-00001.parquet

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-version https://git-lfs.github.com/spec/v1
-oid sha256:8d5dc51c1b7b7135406a7297c6ef13f90106e8806441b95ee1d4fea57e50b50f
-size 27470067

doubleSlitInterference/train-00000-of-00001.parquet

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:7f458743abe493df344e5fc8e3939fb261a844852d6d20b973a4503be9c7b6e9
-size 43194040

dye2d/train-00000-of-00001.parquet

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:3f7a5bd1f7c31c56974c5fa6e1454a9c1ee72bbd150e3bc52a6bcb68a114cb15
-size 5926164

flowpastcylinder2d/train-00000-of-00001.parquet

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:1270915490112af450044f64f566db1e5491cdfff636396e2926be7e98695688
-size 75211130

hyperelasticNeoHookeanCuboid3D/train-00000-of-00001.parquet

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:a5e3b22bdef9d687905286615871e304a889bdfed2800fb92761132f986dee88
-size 57630323

longCuboidBending3D/train-00000-of-00001.parquet

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:5b916191a16ad89fec0dc0b327f19a13ac4a214ba42a8c12552561a798cf9b4c
-size 18064698

pendulum/train-00000-of-00001.parquet

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:273eada18d6d7c98abaeff9ffb88d10d2f6f903f8e7d5dc5a9b46043298c9840
-size 32831369

rigidCollision/train-00000-of-00001.parquet

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:1466fc5c0a403e0eec7fa3bb94d22a1fb6b7fd27f5afa621ec8061f849f25341
-size 12285819

sphereDrop3D/train-00000-of-00001.parquet

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:9f6910fa7bbd456e08dd4df465410802e806866304088115e80a7382ff54cca4
-size 14656337

totalInternalReflection/train-00000-of-00001.parquet

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:b196d8c74ff73750c2872a1e2668337dbbabf1bb6ca2a31e82e132f3f4cb0ecc
-size 41711569