Removed the removed options `showMinorLines` and `showMajorLines` from the docs.
Removed the removed options `showMinorLines` and `showMajorLines` from the docs.

felixhayashi/vis,marcortw/vis,gpolyn/vis,felixhayashi/vis,eflexsystems/vis,gpolyn/vis,Tooa/vis,yotamberk/vis,Tooa/vis,marcortw/vis,eflexsystems/vis,yotamberk/vis