Revert "Set common rsync and dsh parameters in mw-deployment-vars"

/usr/local/bin/mwversionsinuse: 7: /usr/local/lib/mw-deployment-vars.sh: Syntax error: "(" unexpected
Unable to read wikiversions.dat or it is empty.

This reverts commit 7eba91549ad226a4f939ed7144ecf88f1900ffb1.

Change-Id: I4e6675efe28d89e52453b0e2d494881e82cef005