Remove the last five characters from this string.
string = 'thisisastring'
The resulting string after removing the last five characters is: 

string = 'thisis'
Complete the following task based on the instruction and optional input provided.### Instruction:
Remove the last five characters from this string.

### Input:
string = 'thisisastring'

### Output:
The resulting string after removing the last five characters is: 

string = 'thisis'