remove unnecessary word (closes #19060)

Patch by Anastasia Filatova.

Doc/library/subprocess.rst

@@ -9,7 +9,7 @@
 
 The :mod:`subprocess` module allows you to spawn new processes, connect to their
 input/output/error pipes, and obtain their return codes.  This module intends to
-replace several other, older modules and functions, such as::
+replace several older modules and functions::
 
    os.system
    os.spawn*

Lib/subprocess.py

@@ -11,7 +11,7 @@ r"""subprocess - Subprocesses with accessible I/O streams
 
 This module allows you to spawn processes, connect to their
 input/output/error pipes, and obtain their return codes.  This module
-intends to replace several other, older modules and functions, like:
+intends to replace several older modules and functions:
 
 os.system
 os.spawn*