rmv mention of zsh as not necessary (#1371)

Closes #1354.

docs/start/hello-world.ipynb

@@ -21,7 +21,7 @@
     "\n",
     "Follow the [Install and set up](install) instructions if you haven't already, including the steps to [Set up to use IBM Quantum™ Platform](setup-channel#set-up-to-use-ibm-quantum-platform).\n",
     "\n",
-    "It is recommended that you use the [Jupyter](https://jupyter.org/install) development environment to interact with quantum computers. Be sure to install the recommended extra visualization support (`pip install qiskit[visualization]`), and note that zsh users need to put `'qiskit[visualization]'` in single quotes. You'll also need the `matplotlib` package for the second part of this example.\n",
+    "It is recommended that you use the [Jupyter](https://jupyter.org/install) development environment to interact with quantum computers. Be sure to install the recommended extra visualization support (`'qiskit[visualization]'`). You'll also need the `matplotlib` package for the second part of this example.\n",
     "\n",
     "\n",
     "To learn about quantum computing in general, visit the [Basics of quantum information course](https://learning.quantum.ibm.com/course/basics-of-quantum-information) in IBM Quantum Learning.\n",

docs/start/install.mdx

@@ -95,7 +95,7 @@ Whether you will work locally or in a cloud environment, the first step for all
       pip install qiskit-ibm-runtime
       ```
 
-      If you intend to use visualization functionality or Jupyter notebooks, it is recommended to install Qiskit with the extra visualization support. Note that **zsh users** need to put `'qiskit[visualization]'` in single quotes.
+      If you intend to use visualization functionality or Jupyter notebooks, it is recommended to install Qiskit with the extra visualization support (`'qiskit[visualization]'`).
 
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