Every Phone Have option to remove the pattern lock.

Go to the 

1.Setting

2.Security

3.Screen lock

4.click

5.Option Coming(none,Pattern,PIN,Password).

6.Choose NONE option.

Then you have remove the pattern lock. 
In android every phone have same process.

Above answer is also correct.i have tell only remove pattern lock.
In above answer tell pin lock,pattern,password lock describe.
i have only explain pattern lock,how to remove this.