environment variable

[Smith]

Hello to all,
I wanted to ask you how I could delete a line of an environment variable 
(PATH)

~/Scaricati/pycharm-2017.1.4/bin$ echo $PATH | sed s/:/'\n'/g
/usr/local/sbin
/usr/local/bin
/usr/sbin
/usr/bin
/sbin
/bin
/usr/games
/usr/local/games
/snap/bin
/path/to/my/program  ---> linea da eliminare
/home/dbruno/Scaricati/pycharm-2017.1

Do I unset PATH delete all content?
I have not tried yet

I downloaded pycharm and wanted to make it executable from the command 
line without accessing the bin folder and launch the bash script:

dbruno at dbruno:~/Scaricati/pycharm-2017.1.4$ ls -la
total 48
drwxrwxr-x 10 dbruno dbruno 4096 giu 24 10:23 .
drwxr-xr-x 18 dbruno dbruno 4096 giu 24 10:23 ..
drwxrwxr-x  2 dbruno dbruno 4096 giu 24 10:25 bin
-rw-r--r--  1 dbruno dbruno   14 giu 13 14:48 build.txt
drwxrwxr-x  2 dbruno dbruno 4096 giu 24 10:23 debug-eggs
drwxrwxr-x  2 dbruno dbruno 4096 giu 24 10:23 help
drwxrwxr-x 17 dbruno dbruno 4096 giu 24 10:23 helpers
-rw-r--r--  1 dbruno dbruno 1887 giu 13 14:48 Install-Linux-tar.txt
drwxrwxr-x  4 dbruno dbruno 4096 giu 24 10:23 jre64
drwxrwxr-x  4 dbruno dbruno 4096 giu 24 10:23 lib
drwxrwxr-x  2 dbruno dbruno 4096 giu 24 10:23 license
drwxrwxr-x 52 dbruno dbruno 4096 giu 24 10:23 plugin

:~/Scaricati/pycharm-2017.1.4/bin$ ls -la
total 7120
drwxrwxr-x  2 dbruno dbruno    4096 giu 24 10:25 .
drwxrwxr-x 10 dbruno dbruno    4096 giu 24 10:23 ..
-rw-rw-r--  1 dbruno dbruno       0 giu 24 20:18 0M?+
-rwxr-xr-x  1 dbruno dbruno     221 giu 13 14:48 format.sh
-rwxr-xr-x  1 dbruno dbruno   23072 giu 13 14:48 fsnotifier
-rwxr-xr-x  1 dbruno dbruno   29648 giu 13 14:48 fsnotifier64
-rwxr-xr-x  1 dbruno dbruno   26453 giu 13 14:48 fsnotifier-arm
-rw-r--r--  1 dbruno dbruno   10804 giu 13 14:48 idea.properties
-rwxr-xr-x  1 dbruno dbruno     272 giu 13 14:48 inspect.sh
-rw-r--r--  1 dbruno dbruno 3449944 giu 13 14:48 libyjpagent-linux64.so
-rw-r--r--  1 dbruno dbruno 3679036 giu 13 14:48 libyjpagent-linux.so
-rw-r--r--  1 dbruno dbruno    2236 giu 13 14:48 log.xml
-rwxr-xr-x  1 dbruno dbruno     410 giu 13 14:48 printenv.py
-rw-r--r--  1 dbruno dbruno     329 giu 13 14:48 pycharm64.vmoptions
-rw-r--r--  1 dbruno dbruno   10281 giu 13 14:48 pycharm.png
-rwxr-xr-x  1 dbruno dbruno    6860 giu 13 14:48 pycharm.sh
-rw-r--r--  1 dbruno dbruno     337 giu 13 14:48 pycharm.vmoptions
-rwxr-xr-x  1 dbruno dbruno     590 giu 13 14:48 restart.py

You can help me ?

Thank you