Remove cache=true in default.config

[Faizal-Eeman]

Not sure if we need this argument - it goes to

pipeline-call-sSV/pipeline/config/methods.config

Line 187 in 4da6d8b

process.cache = params.cache_intermediate_pipeline_steps

But we also have L37 cache=true

Originally posted by @tyamaguchi-ucla in #52 (comment)

[yashpatel6]

Just a note, we'll still want to document the existence/availability of this parameter in the README, I don't think it's currently listed.