[k32w0][doc] Remove obsolete python dependency

Author: mihai-ignat

examples/contact-sensor-app/nxp/k32w0/README.md

@@ -262,15 +262,14 @@ used to control an antenna switch. In order to use this feature, user must set
 
 In case signing errors are encountered when running the "sign_images.sh" script
 (run automatically) install the recommanded packages (python version > 3, pip3,
-pycrypto, pycryptodome):
+pycryptodome):
 
 ```
 user@ubuntu:~$ python3 --version
 Python 3.8.2
 user@ubuntu:~$ pip3 --version
 pip 20.0.2 from /usr/lib/python3/dist-packages/pip (python 3.8)
 user@ubuntu:~$ pip3 list | grep -i pycrypto
-pycrypto               2.6.1
 pycryptodome           3.9.8
 ```
 

examples/lighting-app/nxp/k32w0/README.md

@@ -275,15 +275,14 @@ used to control an antenna switch. In order to use this feature, user must set
 
 In case signing errors are encountered when running the "sign_images.sh" script
 (run automatically) install the recommanded packages (python version > 3, pip3,
-pycrypto, pycryptodome):
+pycryptodome):
 
 ```
 user@ubuntu:~$ python3 --version
 Python 3.8.2
 user@ubuntu:~$ pip3 --version
 pip 20.0.2 from /usr/lib/python3/dist-packages/pip (python 3.8)
 user@ubuntu:~$ pip3 list | grep -i pycrypto
-pycrypto               2.6.1
 pycryptodome           3.9.8
 ```
 

scripts/setup/requirements.nxp.txt

@@ -1,4 +1,3 @@
 crc>=7.0.0
 jsonschema>=4.17.0
-pycrypto>=2.6.1
 pycryptodome>=3.20.0