Removed Unused import sys (#922)

PatOnTheBack · poyea · commit 26df2aab1ee7 · 2019-07-06T23:35:12.000+08:00
I removed `import sys` because it is not used in the program. This addresses a [recommendation from lgtm](https://lgtm.com/projects/g/TheAlgorithms/Python/snapshot/66c4afbd0f28f9989f35ddbeb5c9263390c5d192/files/ciphers/caesar_cipher.py?sort=name&dir=ASC&mode=heatmap)
diff --git a/ciphers/caesar_cipher.py b/ciphers/caesar_cipher.py
@@ -1,4 +1,3 @@
-import sys
 def encrypt(strng, key):
     encrypted = ''
     for x in strng:

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,3 @@`
`1`		`-import sys`
`2`	`1`	`def encrypt(strng, key):`
`3`	`2`	`encrypted = ''`
`4`	`3`	`for x in strng:`