Remove paskino channel requirement

[lauramurgatroyd]

Now that eqt is on conda-forge we do not need the paskino channel.

[casperdcl]

ok the mambabuild output is slightly less verbose than conda build. Running the latter locally I get:

The following packages are incompatible
├─ ccpi-dvc >=22.0.0  is not installable because it requires
│  └─ _openmp_mutex >=5.1 , which conflicts with any installable versions previously reported;
├─ ccpi-viewer >=22.4.0  is installable with the potential options
│  ├─ ccpi-viewer 22.4.0 would require
│  │  ├─ eqt, which requires
│  │  │  └─ python >=3.7  with the potential options
│  │  │     └─ python [3.12|...|3.7], which can be installed;
│  │  ├─ python 3.6.* , which conflicts with any installable versions previously reported;
│  │  └─ python_abi 3.6.* *_cp36m, which conflicts with any installable versions previously reported;
│  └─ ccpi-viewer [22.4.0|23.0.0|23.1.0] would require
│     └─ python 3.10.* , which can be installed;
└─ vtk 8.1.2.*  is not installable because there are no viable options
   ├─ vtk 8.1.2 would require
   │  └─ python >=2.7,<2.8.0a0 , which conflicts with any installable versions previously reported;
   ├─ vtk 8.1.2 would require
   │  └─ python >=3.6,<3.7.0a0 , which conflicts with any installable versions previously reported;
   └─ vtk 8.1.2 would require
      └─ python >=3.7,<3.8.0a0  but there are no viable options
         ├─ python [3.7.0|3.7.1|3.7.2|3.7.3|3.7.6], which cannot be installed (as previously explained);
         ├─ python [3.7.0|3.7.1|...|3.7.9] conflicts with any installable versions previously reported;
         └─ python [3.7.10|3.7.12|...|3.7.9], which cannot be installed (as previously explained).

[lauramurgatroyd]

We agreed to close this for now until we are able to support VTK >8.1.2