One has to be very careful in today's world to read beyond the headlines.
In truth, and as a full reading of the news reveals, President Trump did not "drop" the JCS, but rather chose to include his chief strategist in their discussions. Mr. Bannon clearly has experience as a military officer, which makes the decision at least sensible.
I hold no brief for Mr. Bannon, some of whose opinions I have found offensive. But when as in this instance, headlines are used as a thinly veiled means of attack, it is incumbent on all readers to get the facts for themselves.