We deal mainly with overhead material handling equipment, and find many applications where on a particular crane/hoist situation the designers have tied the secondary hot (x1) from several control transformers together. They remove the ground for the neutral side to avoid power issues;
the question is is this a good practice?
We used to do that on HVAC controls, tie all the secondary hot's and commons together for control power.
Worked fine until UL decided that the secondary was a separately derived system and made the HVAC mfgrs. ground the common of the xfmr. We used a 2 stage t'stat to control the 2 units and if you turned off 1 of the units and lowered the t'stat to where both units should run it would try to run the unit that was off through the control xfmr.
Needless to say xfmr didn't like that and didn't last long either....
The fix was to take ground of secondary loose. But it also voided UL listing.
To answer your question, no, it is not a good practice to remove the n/g bond of a control xfmr. Especially if it was there from the factory and the unit is UL listed.