Is there way to remove element from list in Mathematica -

is there function in wolfram mathematica removing element original list? example

a={1,2,3}; deletefrom[a,1];  a={2,3} 

if absent can give example of efficient variant of such function? (i know there function delete() create new list. not if list big)

if want drop first element list a statement

drop[a,1] 

returns list same a without first element. note not update a. assign result a, eg

a = drop[a,1] 

note delete doing behind scenes; first making copy of a without first element, assigning name a new list, freeing memory used old list.

comparing destructive updates , non-destructive updates in mathematica quite complicated , can take 1 deep system's internals. you'll find lot subject on stack exchange mathematica site.